1. Not a function.
2. This is a function.
3. This is a function.
Step-by-step explanation:
1. 13 maps on to 4 and -4 so not a function.
2 and 3 - these both pass the vertical line test so they are functions.
f(x)=2/3x+4/3 is the answer because is whose power in the senate is equal to the power of the speaker of the house?
step-by-step explanation: