## Sarah_Miller720 Group Title Write an equation in point-slope form for the line through the given point with the given slope. (–7, 9); m = 4/5 I need help, idk how to write equations. one year ago one year ago

1. zordoloom

Do you know what the point-slope formula is? If so, could you write it out?

2. JayDS

use the unknown equation formula. since we have m=4/5 and one point (-7,9) x1,y1 y-y1=m(x-x1) y-9=4/5(x--7) expand and solve for y to be on the LHS to look like this y=......

3. JayDS

point-slope form/general linear equation would be y=mx+c m=gradient c=y-intercept.

4. zordoloom

Just leave whatever you get in point slope formula. You don't have to rearrange it. Which is y-y1=m(x-x1)

5. zordoloom

So you would leave y-9=4/5(x--7) as is, except change x--7 to x+7

6. JayDS

point slope formula is meant to be y=mx +c so I believe u have to rearrange for y to be on the LHS

7. zordoloom

y=mx+b is the slope intercept form. y-y1=m(x-x1) is the point slope form.

8. JayDS

u are right, I just briefly searched it, sorry I didn't know the difference.

9. Sarah_Miller720

y-0=4/5(x+7)

10. JayDS

never knew y-y1=m(x-x1) was called point slope form, thought it was y=mx+b/y=mx+c

11. zordoloom

Since the question requested for point slope form, leave it as y-9=4/5(x+7)

12. Sarah_Miller720

oh that 0 is suppose to be a 9 i clicked the wrong number btw