Question

Explain why it's sometimes helpful to use the point-slope form instead of the slope-intercept form..

Answer 1

For a slope-intercept form, you only have the data of the slope and the y-intercept. On the other hand, for a point-slope form, you have data on the slope and one point. It is sometimes useful to make use of the latter because in this form, you can graph the equation using only one point. You can also see a point included on the line.