Answer
$f'(1)\approx 2, f'(3)\approx 0, f'(5)\approx -2, f'(6)\approx -1$
Work Step by Step
The value of the derivatives at each point of the graph can be estimated by finding the slope of the line at the point.
$f'(1)\approx 2$
$f'(3)\approx 0$
$f'(5)\approx -2,$
$f'(6)\approx -1$
