This should be easy. This is first time I'm doing these in over a decade.

Write the equation of the line that goes through point P and has slope m.

P(-5,2), m = -1

Here is what I did:

Y – y1 = m( x – x1)

Y – 2 = -1(x – (-5))

Y – 2 = -x + 5

Y = -x + 7

X + y = 7

Here is what the answer is supposed to be:

x + y = -3

how did I screw this up? Thank you.