Which of the equations below represents a direct variation equation? (Which equation is proportional?) * A) y = 1.6x
B) y = \pi x^(2)
C) y = x + 6

Which problem would you use the following proportion to solve for? 24/x = 40/100 a. what is 40% of 24? b. what percent is 24 of 40? c. twenty-four is 40% of what number? d. forty percent of 24 is what number?