Question

what is the a - value (or y - intercept) for the function: $f(x)=800(0.85)^x$? options: 0.15, 0.85, 800, x

Explanation:

Step1: Recall exponential form

An exponential function is $f(x)=a(b)^x$, where $a$ is the y-intercept.

Step2: Match given function to form

Given $f(x)=800(0.85)^x$, compare to $f(x)=a(b)^x$.

Answer:

C. 800