Answer
Stem and leaf plot.
Work Step by Step
First of all, you must sort the numbers.
$15.3, 15.7, 17.5, 17.6, 18.4, 18.6$
Create a key for your Stem and leaf plot. In this case, I will use
$17|6=17.6$
Create a stem and leaf plot and on the left side, put
$15$
$16$
$17$
$18$
This represents the tens and the ones place.
On the right side, put the tenths place of each number.
