Question

Which of the following represents exponential growth?


`y = 2x + 5`

`y - x = 4`

`x = 3`

`y = 5 * 2^(x)`

Answer 1

The exponential growth:

`y=a\cdot b^x`

Therfore your answer is
`y=5*2^x`

--------------------------------------------------------

y = 2x + 5 it's a linear function in slope-intercept form

y - x = 4 → -x + y = 4 it's a linear function in standard form

x = 3 it's a vertical line

Answer 2

y = 5 ×
`2^(x)`

Explanation:

Exponential growth equations are usually in the form y = a ×
`b^(x)`.

So, y = 5 ×
`2^(x)` is the best fit for that format.

Have a great day!