3. Which of the following equations does not represent a function?
A. y = 3
B. X=-1
C. 2x + 3y = 9
D. y = x^2

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.

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Select the number of ways in which a line and a circle can intersect