Answer:
$3.5/gallon
Explanation:
The slope of the line is the cost per gallon. Calculate Rise/Run:
Rise ((35/4) - 0) or (35/4)
Run ((5/2) - o) = (5/2)
Slope = Rise/Run = (35/4)/(5/2)
(35/4)*(2/5) = 7/2 or $3.5/gallon
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