So we will begin with the equation for any slope it is (y2 - y1)/(x2 - x1) and we will put each given point in its place (-8-(-1)) / (t -(0)) then sum up the nominator -1 = (-7) / t -0 and to find t we have to divide -7 over -1 and add -0 which will give us 7 So the value of t is 7
