Question

how do you find the y intercept of a line when you only know the slope?

Answer 1

what is all the information you have?

Answer 2

If you only know the slope you can easily find a y-intercept.

Since you didn't provide any data I am going to make something up.

Let's say your slope is 1/3. (2-1/4-1) (y2-y1/x2-x1) The x coordinates being (-1,2), and the y coordinates being (-1,4).

You will plug the slope into y=mx+b

y=(1/3)x+b

Then you will plug in either of your x and y coordinates

4=(1/3)2+b

Then solve for b.

4=(1/3)2+b
4=2/3+b
4-2/3=b
3 1/3=b

So this case your y-intercept would be 3 1/3.

Hope this helps.