Question

What is the slope of a line that passes through (-1,-1) and (-3,-3)

Answer 1

(-1,-1)(-3,-3)
slope = (-3 - (-1) / (-3 - (-1) = (-3 + 1) / (-3 + 1) = -2/-2 = 1

Answer 2

Y2 - Y1/X2-X1
-3 - (-1)/ -3 - (-1)
-2/-2 = 1
So, the slope is 1.