Rewrite the equation y = 5x – 2 as a function of x.

This problem is already a function of x. y = 5x - 2 as a function of x.

Rewrite the equation –x – 4y = 20 as a function of x.

Graph f(x) = –3x – 2.

Solve the system by graphing.

To rewrite the equation –x – 4y = 20 as a function of x, we need to isolate y on one side of the equation.

-x - 4y = 20
Subtract -x from both sides to move the x term:
- 4y = x + 20
Divide both sides by -4 to solve for y:
y = (-1/4)x - 5

The equation –x – 4y = 20 can be rewritten as a function of x: y = (-1/4)x - 5.

To graph the function f(x) = -3x - 2, you can follow these steps:
1. Choose a set of x-values that you want to plot. For example, you can choose -2, -1, 0, 1, and 2.
2. Substitute each x-value into the function to get the corresponding y-values. For example, if x = -2, then y = -3(-2) - 2 = 4.
3. Plot the points (x, y) on a graph.
4. Connect the plotted points with a straight line.

To solve a system of equations by graphing, you can follow these steps:
1. Graph each equation on the same coordinate plane.
2. Find where the two lines intersect. This point represents the solution to the system of equations.
3. If the lines do not intersect at a single point, then the system has no solution.

These steps can be done by hand or by using a graphing calculator or software.