Lucy plans to drive 360 miles. if her car can travel 20 miles
per gallon of gas, how many gallons of gas will she need to
make the trip?

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for