Complete the equation of the line through -10, -7 and -5, -9

Question

Complete the equation of the line through -10, -7 and -5, -9

Answer 1

(-10,-7) and (-5,-9) has slope (-7+9)/(-10+5)/(-7+9) = -2/5

y=(-2/5)x + b, plug in either point to solve for b = the y intercept

-7 = (-2/5)(-10) + b

b = -7 -4 = -11

y = (-5/2)x -11