I uh need help its easy

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

(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)

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?