Question

find the value of x or y so the line passing through the two points has the given slope
(-3,y),(-9,-2); m = 1

Answer 1

ready?

Answer 2

since we know a line has the form y=mx+b, we can use the point-slope formula with the 2nd coordinate.

Answer 3

y-y1 = m(x-x1) right?

Answer 4

so now insert the coordinates (-9, -2) into that formula: y-(-2) = 1(x-(-9) or y +2 = x+9

Answer 5

solve for y. can u do the rest?

Answer 6

y = 4??

Answer 7

y +2 = x+9 ... so move the 2 over by subtracting 2 from both sides to isolate y. then your answer will be in y=mx+b form

Answer 8

y=x+7?

Answer 9

yes!!