Question

Graph the function y = 5(1/4)^x. Complete the ordered pairs for the x-values of −2, −1, 0, and 1 by finding the y-values.(1 point)
Responses

(−2,−2.99), (−1,−1.49), (0,0), and (1,1.49)


(−2,80), (−1,20), (0,5), and (1,1.25)


(−2,0.45), (−1,0.67), (0,1), and (1,1.50)


(−2,−2.5), (1,1.25), (0,0), and (1,1.2)

Answer 1

y = 5(1/4)^x gives

x = −2: y = 5(1/4)^(−2) = 5·4^2 = 5·16 = 80
x = −1: y = 5(1/4)^(−1) = 5·4 = 20
x = 0: y = 5(1/4)^0 = 5·1 = 5
x = 1: y = 5(1/4)^1 = 5·1/4 = 1.25

So the correct choice is: (−2,80), (−1,20), (0,5), and (1,1.25).