Question 876539
f(x)=(x^2)-2x 
f(0) = 0
f(1) = -1
f(3) =  3
average rate of change: (-1/2 + 4/2) 
{{{drawing(300,300,   -6, 6, -6, 6, grid(1), 
circle(1, -1,0.2),
graph( 300, 300, -6, 6, -6, 6,0, x^2-2x) )}}}