The y-intercept of a line is the point where the line crosses the y-axis. To find the y-intercept from the equation of the line, you can substitute x = 0 into the equation.
For the equation y = x + 3, let’s substitute x with 0:
y = 0 + 3
So, y = 3.
This means that the y-intercept of the line is the point (0, 3). In simpler terms, when the value of x is 0, the value of y will be 3, which is where the line will cross the y-axis.