m is the gradient..

Formula to find the gradient is ( y2 – y1 / x2 -x1)

Gradient = -9 – (-8) / -7 – (-3) = -1 / -4 >> 1 / 4

Now take any x and y value that is either from the first brakcet or the second one

First Bracket>>>>

Y = mx + c >> – 8 = 1 / 4 * -3 + c

-8 = 1 – 12 + 4c / 4

-8 * 4 = 1 – 12 + 4c

-32 = -11 + 4c

-32 + 11 = 4c

-23 = 4c

c = -23 / 4 >> -5.75

Now put the value of c in the equation and donot put the values of x and y this time

y = mx + c

y = 1 / 4x + -5.75

Equation = y = 1/4x – 5.75

Most probably if u put the other two points in the equation u will get the right answer.!!

Both points must work in the equation!!!!

y+8=1/4(x+3)

y+8=(1/4)x + 3/4

y=(1/4)x-29/4