Question

Question

Which answer is an equation in point-slope form for the given point and slope?


point: (1, −9); slope: 2


Responses


y+9=2(x+1)


y+9=2(x−1)


y−9=2(x−1)


y−9=2(x+1)

Answer 1

y + 9 = 2(x-1)

Explanation:

Pt slope is y-y1 = m(x-x1)

Plug in your point (x1,y1) and the slope for m.

So using the point (1,-9) and slope 2:

y-y1 = m(x-x1)

y- -9 = 2(x-1)

y + 9 = 2(x-1)