How to write the equation of a line given the slope and Y-intercept?

Question

I'm not sure how to do this so an explanation would be helpful, but the slope is -4 and the y-intercept is 2. So the answer would be nice, but if you could explain how to solve the problem that would be great :)

Anonymous · Accepted Answer

well  y=mx+b so basically it would be y=-7 because 1x is the same thing as x because 2x would basically mean theres 2 x's there is the quantity of 1 x so if you put a zero there as the slope it wont exist. So....y=-7

T · Answer

the simplest form for graphing is y=mx+b where b is the y intercept and m is the slope.  since you have both, you can just plug it in. i dont think you can solve any further..

if the slope was 0 and the intercept 7, it would be y=x+7

Wave-Dash · Answer

You have to use the formula: y=m(x)+b
You plug the slope in for "m", and the y intercept is pluged in for "b". The X just represents where it is on the x-axis, so all you have to do is plug the numbers into the equation. The answer comes out to be:

Answer: y=-4x+2

equation: y=m(x)+b

Where to plug stuff in:  y = slope(x) + y intercept

It's as simple as that!

freeblockpool_dot_com · Answer

The way to remember this is to memorize what the parts of the equation mean... 

Y = mX+b

m = the slope
b = the y intercept

You already know the y intercept and the slope! Can you write the equation now? If not, see below...
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Y = -4x + 2

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How to write the equation of a line given the slope and Y-intercept?

4 Answers