David receives a cable television bill for $29.88. However, there is a late charge of $3.00. He receives a credit of $15.00 for vacation time when the cable was disconnected. How much was his bill?

Where m is the slope of the line and b is the y-intercept of the line, or the y-coordinate of the point at which the line crosses the y-axis. to write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. this is the value of m in the equation.