# Intro to exponential functions (y=a^x, a^-x)

## Interactive practice questions

Which of the following are exponential functions?

Select all the correct options.

$y=x^5$y=x5

A

$y=2x+5$y=2x+5

B

$y=2^x$y=2x

C

$y=x^e$y=xe

D

$y=\left(\frac{3}{4}\right)^x$y=(34)x

E

$y=e^x$y=ex

F

$y=x^5$y=x5

A

$y=2x+5$y=2x+5

B

$y=2^x$y=2x

C

$y=x^e$y=xe

D

$y=\left(\frac{3}{4}\right)^x$y=(34)x

E

$y=e^x$y=ex

F
Easy
Less than a minute

Consider the equation $y=3^x$y=3x.

Consider the function $y=3^x$y=3x.

Consider the function $y=3^{-x}$y=3x.

### Outcomes

#### 10D.QR1.04

Compare, through investigation using technology, the features of the graph of y = x^2 and the graph of y = 2^x, and determine the meaning of a negative exponent and of zero as an exponent .