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Simple Question (1 Viewer)

-billiris

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General Form:

Ax+By+C=0

I know you can quickly find the gradient by going -a/b

How do you find the y-intercept? I think it was c/a but i could be wrong.

Thx :) my textbook only has gradient.
 

Flop21

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You can find the y-intercept by looking at the +C if it's in y=mx+c. But honestly that's not really a great way to find it, or reliable. I would do what rand_althor said and just make x=0 so you can solve the equation to find y=whatever. Same for the x-intercept, make y=0 so you end up with x=whatever.
 

InteGrand

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You can find the y-intercept by looking at the +C if it's in y=mx+c. But honestly that's not really a great way to find it, or reliable.
It actually is a great way to find the y-intercept if the equation is given in that form. It's not called the slope-intercept form for nothing! (m tells us the slope and c tells us the y-intercept, so no need to waste time finding those if we can read them straight off the equation.)
 

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