Enter an equation in point-slope form for the line.
slope is 9 and (-8, -1) is on the line.
the equation of the line in point slope form is:

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.