What is the y intercept on a graph?

This is the point on the y-axis where the graph crosses.

The easiest way to find this point is to plug in 0 into the x value and solve for y.

Example:

2x+3y=6

Plug in 0 for x (all points on y-axis are of the form 0,y).

0+3y=6

therefore y=2

so, (0,2) is the point on the y axis and so you say that 2 is the y-intercept. You can also say (0,2) is the y-intercept. I never take off points if they say either. They are both the same in my opinion (math instructor).

The y-intercept of a line is the value of y at the point where the line crosses the y axis