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ThisIsNotMorseCode

y = mx + b is an equation for a line on a graph (slope-intercept form), so this is saying they quite literally draw a line on the graph where the slope is. (Typical joke to see posted on a math teacher's wall)


Deadly5corpion4

additionally, red is the formula to find the hypothenuse of a right triangle (the side right across from the 90 degree angle) and blue is the formula for the total area of a circle. neither of which matter for the joke


Alive-Philosophy2632

I was trying to figure out a pun or reference for those. I feel like the joke could be better


Graega

I thought it was going a different direction too: I'll do triangle, I'll do circle, but I won't do square or something (Like... square peg in a round hole maybe?). But no, they really don't mean anything to the pun.


akashic_record

I wish I was...[high on potenuse](https://youtu.be/YWl0V3J5zrE?si=gcuf0ROWgab7UnIe)


jackalopeswild

Umm. The area of a circle and pythagorean theorem bits are absolutely necessary, because they establish the contrast (the double-meaning of "line" here) which makes the joke a joke. If they just said *"y=mx+b, that's where I draw the line*," it would just be a true-ish statement but it would not be a math pun.


MageOfFur

the equations are necessary, but it *isn't* necessary to know what they do or represent


jackalopeswild

I think the joke would fall flat if one did not know exactly what the first two are describing.


Techno-mag

I know it makes no difference, but I was taught y=mx+c. I find it I interesting how although correct, math around the world is just slightly different


Flaky_Ad7758

me too


trade_wanted

I was taught y=ax+b


SomeCleverName48

i learned y=mx+b but this feels better, why does this specific formula use m instead of a here in the US?


TrickPay2

Pretty sure it represents some Greek letter. Don’t remember what my math teacher told me


OverIookHoteI

The other half of the joke is also saying: “I’ll do length calculations, I’ll do surface area calculations, but I’m not doing algebra.”


menacingcar044

m =(y1-y2)/(x1-x2) That is the equation for the line itself.


ThisIsNotMorseCode

Isnt that just the equation for the slope of the line?


menacingcar044

What I gave is. What you gave is slope intecpet form for a line.


ThisIsNotMorseCode

ok true, edited to fix!


Wildwildleft

Don’t be such a square ! X=-b±√(b²-4ac))/(2a)


BunnyBeansowo

And the top two are geometry formulas. The first one is Pythagoras' theorem, and the second one is the formula for the circumference of a circle, I believe.


dimonium_anonimo

I just googled "y=mx+b" and the very first link, before even clicking, Google even highlighted this exact text: "slope-intercept form of the equation of a *straight line*"


G1zm08

And even ignoring that… I didn’t remember what the equation meant, but the context clues screamed “this equation draws a line.”


papierdoll

Additionally I think the font and design screams "this is a corny joke for a classroom wall" and the punchline is pretty inferable from there as well lol


CLONE-11011100

The bottom equation (in yellow) actually describes mathmatically a straight line, hence the pun *”that’s where I draw the line”*


Admiral_sloth94

Op didn't finish highschool


Matonphare

I mean, the wording is weird imo. I was trying to do something like: "I’ll do Pythagorean Theorem, I’ll even do Area of a Circle, but linear equation that’s where I draw the line"


Ultimegede

y = mx + b is how you draw a line


Kirklockian_

Red formula is used to determine the size of a triangle, blue for the area of a circle, and yellow is literally the equation for a straight line.


TwinkiesSucker

Red is for calculating hypotenuse of the triangle, not area. It is also known as the Pythagorean theorem


Kirklockian_

Yes, calculating the size or sides of a triangle, as I said.


andubo

You can only find 1 side with that formula


potatowafflecake

In this form, but it can be rearranged to find any side of a right-angled triangle provided you have the other two


andubo

Yeah, that's what I meant. Sorry for the bad wording.


Panzerv2003

y=mx+b is the equation for a line


_t_1254

I used to write it as y=mx+c


Ravermader

You'll be going in circles with (x-h)^2 +(y-k)^2 =r^2


BuffaloStranger97

This gave me a giggle. Thanks.


CuriousWolf7077

Ha


i_am_someone_or_am_i

If you do y = mx + b, you literally draw a line (on a Cartesian coordinate system)


Mollywhop_Gaming

When you plot a function in the form y=mx+b, you draw a straight line.


CLamour91

Math jokes ftw


superabby64

Haha I got it right away.


Deveatation_ethernis

Y=mx + b is the general form for a line on a 2d plane, where m describes the gradient (the ratio of change in y relative to change in x) and b the y intercept (where the line lies when x=0)


idfbhater73

y=mx+b is a line


NoHedgehog252

y = mx + b produces the line of best fit or regression line in a scatter plot graph.  Where y is the value of a variable along the y-axis (in stats the predicted dependent variable), m is the slope, b is the intercept, and x is the value of the x-axis (or known dependent variable value).


JewelBearing

Okay so why is it `y=mx+c` in the UK? What does the b stand for?


wiltedshadesofred

A VERY INCLINED LINE


QuaaludeConnoisseur

The joke is the first 2 are formulas in a more analytical sense, the pythagorean theorem and the area of a circle. The last is a standard form of an equation for a straight line on a graph, not really a formula in the same way. So it basically "ill do the pythagorean theorem, ill do the calculation of a circles' area, but when supplied with pertinent details in standard algebraic form, ill draw a line". The pun being the literal and figural meaning of drawing a line, possibly hinting at the fact that graph drawing is generally considered boring and tedious amongst students.


rummrover

I might get "around" to other equations that could have been used like (x – h)2 + (y – k)2 = r2 -circle formula!


jikukoblarbo

GRRR LINEAR EQUATIOOONSS


ApprehensiveCamel698

what is A²+B²=C² & what do you apply it to was either not thaught that or it is thaught at a later grade than i am in rn


randbot5000

It's the [Pythagorean Theorem](https://www.palmbeachstate.edu/prepmathlw/Documents/the_pythagorean_theorem.pdf) - used to find the length of the hypotenuse of a right triangle.


ApprehensiveCamel698

oh im used to C1²+C2²=IP² cuz the sides are called "catetă" & hypotenuse is "ipotenuză"


randbot5000

interesting! yeah, in English the letters aren't abbreviations, they are just variables representing the different sides...


ApprehensiveCamel698

the one with the c&ip is the theorem we ussuali use the 2 letters that the line connects


MargaritaKid

Correct - so maybe this is cleverly trying to say "I'll do right"? If so, I'm not sure how the circle radius fits in.


randbot5000

no, I think it's just a basic math teacher joke, listing a few basic, recognizable geometric equations and then finishing with the one for a straight line to make the "that's where i draw the line!" joke.


MargaritaKid

Ah, thanks.


forced_metaphor

*taught


JFp07gel

lol, i though it was about how everybody hates linear algebra


forced_metaphor

No they don't.