Question

Clocking the Cheetah. Construct a relative-frequency polygon for the speed data given in Exercise 2.89. Use the classes specified in that exercise.

Short answer

Figure depicts the relative frequency polygon.

Step-by-step solution

Given Information 

Given in the question that, to refer exercise 2.89. We have to construct a relative-frequency polygon for the speed.

Explanation 

From the result of previous exercise,

class	Frequency	Relative frequency
$52-<54$	$2$	$0.057$
$54-<56$	$5$	$0.143$
$56-<58$	$6$	$0.171$
$58-<60$	$8$	$0.229$
$60-<62$	$7$	$0.2$
$62-<64$	$3$	$0.086$
$64-<66$	$2$	$0.057$
$66-<68$	$1$	$0.029$
$68-<70$	$0$	$0$

$70-<72$	$0$	$0$
$72-<74$	$0$	$0$
$74-<76$	$1$	$0.029$
Total	$35$	$1$

Explanation 

The midpoints are located in the middle of two lower limits:

$53,55,57,59,61,63,65,67,69,71,73,75$

As indicated below, add the above points to the graphs and connect them with a straight line.