Question

anisha is graphing the function f(x) = 25(Three-fifths)x. She begins by plotting the point (1, 15). Which could be the next point she plots on the graph?

(2, 9)
(2, –10)
(2, 14Two-fifths)
(2, 5)

Answer 1

Interpret f(x) = 25*(3/5)^x. Since f(1) = 25*(3/5) = 15, compute f(2):

f(2) = 25*(3/5)^2 = 25*(9/25) = 9.

So the next point could be (2, 9).