Answer:
to make life harder, sadly
Step-by-step explanation:
The answer is 4 because it adds 4 to each one.
<span>You can find the y-intercept by looking at the graph and seeing which point crosses the y axis. This point will always have an x coordinate of zero. This is another way to find the y-intercept, if you know the equation, the y-intercept is the solution to the equation when x = 0.</span>