It’s B because 2 quarts equal 0.5 gallons
Given:
The objective is to find the slope of the straight line.
Explanation:
The general equation to find the slope is,

Let's consider two coordinates from the graph.

On plugging the values in the equation of slope,

Hence, the slope of the straight line is -5.
216/8= 27. X= 27. Subtract you divide
The 1st , 3rd , 5th and 6th apply