To check whether the equation represents a function, substitute values into the equation to complete the tables. then, look back at the definition of a function. is this relationship a function?

If square root x = -7, then x= -49 true or false

Afootball is throw by a quarterback to a receiver

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.