Question

Math Whizzes I have freshman question-

On a coordinate plane, an exponential function decreases from quadrant 2 into quadrant 1 and approaches y = 0. It crosses the y-axis at (0, 4).
What is the initial value of the exponential function shown on the graph?

0
1
2
4

Answer 1

4

Explanation:

Exponential functions are written in the form
`f(x)=ab^x`

`a` is the initial value of an exponential function and is found by substituting
`x=0` into the function as
`b^0=1`

Therefore, as y = 4 when x = 0, the initial value is 4