How many solutions are there to this system of equations?

If the lines overlap each other than, it has infinite solutions.
If the lines are parallel, do not touch each other, then there is no solution.
if the line are perpendicular, touch only once, then there is only one solution.

In this case, both lines overlap.
taking the green line equation and make it equal to red.
y=1/4 (x-4)
Multiply 1/4 with x and -4 and you get:
y = 1/4x - 1

Many solutions, because lines overlap.

He is right i did this thing before