The constant term in the equation (the + 1 or ‒ 2) shows the point where the graph crosses the y -axis. This is known as the y -intercept and is represented by the letter c in y = m x + c.

So the y intercept, notice, at any point along this y axis here, that all that is going to be is a zero for our x's, and of course it can be any y possible. So, now let’s look at say if we had a ...

Slide 1 of 9, Y equals two x minus five. Minus one is less than or equal to x, which is less than or equal to three., Draw the graph of 𝒚 = 2𝒙 – 5 for values of 𝒙 from -1 to 3.