Find the slope and y-intercept ax+by=c

The student will enter the slope and y-intercept by solving for y with the equation of the form: a x + b y = c. The linear equation slope-intercept form is y = m x + b. When is there no y-intercept? When is the slope undefined?
When slope is m = 0, you may not be able to enter the correct y-value, b, for the intercept. {This is a limitation of computer programs due to round-off errors.} When the slope is undefined, there is no y-intercept. Activity requested by Dr. R. Balotro.