Aclassmate is having trouble factoring special case polynomials?

Can someone explain to me how to do

(05.03 mc) part a: explain why the x-coordinates of the points where the graphs of the equations y = 4x and y = 2x−2 intersect are the solutions of the equation 4x = 2x−2. (4 points) part b: make tables to find the solution to 4x = 2x−2. take the integer values of x between −3 and 3. (4 points) part c: how can you solve the equation 4x = 2x−2 graphically? (2 points)

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319