WeBWorK Standalone Renderer

For each function, enter the letter of the matching graph below,

1. $3^x$
2. $3^{-x}$
3. $3^x+6$
4. $-3^x$

Note: you can get a larger view of any graph by clicking on it.

A.
B.
C.
D.

In order to get credit for this problem all answers must be correct.