Cana buys candy for her birthday party at a supermarket where there is no sales tax. She buys lollipops that cost $0.49 each and
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since the graph has direct variation as data in x axis increases y also increases.
so we need to find how many miles travelled per galloon .
we distance travelled per gallon =total distance travelled/galoons of fuel used.
for part b) slope=rise/run
slope of the graph is 2