Ineed

1. what is the output value for the following function if the input value is 4.5?
y = 2x + 0.5
2
4.5
9.5
25

2. what is the output value for the following function, f(x) = 5x - 2 if the input value is 3?
1
13
17
51

3. nina is participating in a swim-a-thon to raise money for a charity. for every lap that nina swims, her grandmother has promised to donate $2.50. if nina swims 18 laps, how much will her grandmother donate?
$45.00
$20.50
$18.00
$7.20