A. Definitions
- x-intercept – the point where the line crosses the x-axis.
- y-intercept – the point where the line crosses the y-axis.
B. How to Graph Using the x and y Intercepts
- Find the x-intercept.
- Substitute zero in place of y in the equation.
- Solve the equation for x.
- You get the ordered pair (x, 0).
- Find the y-intercept.
- Substitute zero in place of x in the equation.
- Solve the equation for y.
- You get the ordered pair (0, y).
- Graph the two intercepts or points.
- Connect the points with a straight line and arrows on each end.
- Label the line with its equation.
|
|
|