Chapter 1.2, Problem 40E

(a)

To determine

To explain: about the dots in $6$ in the graph.

Answer to Problem 40E

The dot above $6$ represents that once out of $21$ car models had $6$ points higher EPA mileage in highway than inside city.

Explanation of Solution

Given:

  

The dot-plot displays the difference (highway-city) in EPA mileage ratings for each of the $21$ car models. The dot above $6$ represents that once out of $21$ car models had $6$ points higher EPA mileage in highway than inside city.

(b)

To determine

To explain: about fuel economy versus the car models on the highway

Answer to Problem 40E

The graph tells that the highway has better EPA mileage as compare to city. The fuel economy is better on highway than in city.

Explanation of Solution

The graph tells that the highway has better EPA mileage as compare to city. The fuel economy is better on highway than in city.