Question

Graph the function f(x) = 21(0.5)x.

an exponential graph decreasing from the left and crossing the y axis at 0 comma 5
an exponential graph decreasing from the left and crossing the y axis at 0 comma 21
an exponential graph decreasing from the left and crossing the y axis at 0 comma 18
an exponential graph decreasing from the left and crossing the y axis at 0 comma 8

Answer 1

Option A: an exponential graph decreasing from the left and crossing the y axis at 0 comma 5

Explanation:

It has to start with a y-intercept of 21 because f(x) or as another way of saying it, y, equals 21 and then the number has to halve itself and thats why its so steep in the beginning. Hope this helps :)

Answer 2

B

Explanation:

(so that poeple know previos person messed up and said that in comments i didnt want any1 els to have that mistake.)