Add 3 and 4 together to give 7. Divide 24 by 7 to give 3.42857143. Multiply 3.42857143 by 3 to give 10.2857142857. Lastly, 3.42857143 by 4 to give 13.7142857143
V = x/t = 4.5 mil / 3 h = 1.5 mph Since, v = 1.5 mph (or we can say that v is constant), distance and time vary directly and the constant of variation is 1.5 mph.