Question 404646
slope of line is given by m = (y2-y1)/(x2-x1)

given points are 
(-3.3,15.5)  and  (-0.8,5.6)

x1 = -3.3, y1 = 15.5
x2 = -0.8, y2 = 5.6

replacing the values we get

m = (5.6 - 15.5)/(-0.8 - (-3.3))
m = -3.96