Question 1016272
Here is the graph of y = x^3
{{{ graph( 300, 200, -10, 10, -10, 10, x^3)}}}
:
if x is -1, then y = -1 and the point is (-1, -1)
:
now chose a small increment to x, -1.1, then y  = -1.331
:
slope = (-1.331 -(-1)) / (-1.1 -(-1)) = -0.331 / -0.1 = 3.31