The unit rate for the situation that shows the relationship between the distance a truck can travel and the amount of gasoline used is 7 miles per gallon
The graph given is a straight line.
The unit rate in the situation will be gotten by finding the slope of the line graph.
The slope of the line is expressed using the formula:
[tex]m=\frac{y_2-y_1}{x_2-x_1}\\[/tex]
Using the coordinate points (1, 7) and (5, 35) on the line
[tex]m=\frac{35-7}{5-1}\\m=\frac{28}{4}\\m=7mi/gallon[/tex]
This shows that the unit rate for the situation is 7 miles per gallon
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