Question

9. "a varies directly as b." If a = 3 when b = 24, find b when a = 10.

Answer 1

"a varies directly as b" MEANS \(a = kb\)

Just write it down when you read that.

Answer 2

would b =30

Answer 3

36

Answer 4

Are you throwing darts? Use the structure I gave you to find "k". Tell me what "k" is, based on the values that are given in the problem statement.

Answer 5

how would i find k

Answer 6

tkhunny's "a=kb" illustrates the "direct variation" or "direct proportion" principle needed here. You are told that a is 3 when b is 24. Substitute these values of a and b into the equation a=kb and then solve the resulting equation for k. Your turn.