Please help solve 2d+7=9

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

In angle pqr find the measure of

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.