  ### Home > CALC > Chapter 3 > Lesson 3.3.4 > Problem3-131

3-131.

The graph of $f(x)$ is shown at right. Use the graph to list the following values in ascending (increasing) order:

$0, f^\prime(1), f^\prime(4),\frac { f ( 3 ) - f ( 1 ) } { 3 - 1 }$

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$f^\prime(1)$ means the slope at $x = 1$. Is the slope at $x = 1$ positive, negative or zero? How does this compare with the slope at $x = 4$?

$f^\prime(4)$ means the slope at $x = 4$. Is the slope at $x = 4$ positive, negative or zero? How does it compare with the slope at $x = 1$?

means the average rate of change between $x = 3$ and $x = 1$.
Graphically, this can be seen as the slope of the secant line. Is that slope positive, negative or zero? How does it compare with the slopes at $x = 1$ and $x = 4$, and with the value of $0$?

Looking at the graph from left to right, it is increasing always. The slopes start steep and, as $x→∞$, get smoother. Use the eTool below to help solve the problem.
Click the link at right for the full version of the eTool: Calc 3-131 HW eTool