Let x = number of hours Carson works.

Let y = amount of money that Carson makes.

Then y = 7x

x is the independent variable, and y is the dependent variable. The money that Carson makes depends on the hours that he works.

2. Let x = amount that Ed donates, and y = amount that Kay donates, then

y = 2x

Again x is the independent variable and y is the dependent variable.

The amount that Kay donates depends on the amount that Ed donates.

3. For f(x) = 5x + 1, find f(x) when x =2 and when x = 3

For x = 2, you just need to replace all the x's with 2's.

f(2) = 5(2) + 1 = 10+1 = 11

You try f(3).

4. For g(x)= -4x, find g(x) when x = -6 and when x = 2

f(-6) = -4(-6) = 24

You try g(2).

5. For h(x) = x - 3 find h(x) when x = 3 and when x = 1.

h(3) = 3-3 = 0

You try h(1)