Aaron travels 3 miles per hour in still water on his kayak. The expression 3 can be used to find the time it takes for him to travel
with the current. If x represents the rate of the current, what does the denominator represent?

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