exam Maths Puzzle Numerical Ability

I have to determine which equation is graphed but have no clue how to read the graph. If you could please provide a graph for each of the equations below, I will be able to match i

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exam Other Question

A car uses 8 gallons of gasoline on a trip of 80 miles. At that rate, how much gasoline will a trip of 160 miles require? At what point do the two lines with the equation x+3y=13 and y=3 intersect? My answer was (3,3), but i am not so sure if it is the correct answer. can you please tell me if it is? thank you