Question

the stem - and - leaf plot below gives the gas mileages (in miles per gallon) for 16 new cars. use the plot to answer the questions that follow.
gas mileage (miles per gallon)
1|2 6
2|0 3 6
3|0 1 4 9 9
4|0 5 7 9
5|0 8
key: 1|2 means a gas mileage of 12.
(a) what is the lowest gas mileage in the 30s?
(b) how many cars have a gas mileage in the 10s?
(c) what is the highest gas mileage overall?

Explanation:

Step1: Understand stem - and - leaf plot

A stem - and - leaf plot shows data where the stem is the leading digit(s) and the leaf is the trailing digit. The key 1|2 means 12.

Step2: Find the lowest mileage

Scan the plot for the smallest value. The smallest value in the plot is 16.

Step3: Count cars with mileage in 10s

Look at the stems representing the 10s (stem = 1). The leaves for stem = 1 are 6, so there is 1 car with mileage in the 10s.

Step4: Find the highest mileage

Scan the plot for the largest value. The largest value in the plot is 58.

Answer:

(a) 16
(b) 1
(c) 58