1 mph
step-by-step explanation:
if the question is asking how much does she drive per mile then,
13 / 13 = 1 mph
the square root of 16 is 4.
4*4 = 16
assuming this is from a math graphing problem.
7 would be on the x-axis which is the horizontal line on the graph
84 would be on the y-axis which is the vertical line on the graph