Which equation should be used to graph on a calculator?

Derricks dog sitting and darlene's dog sitting are competing for new business. the companies ran the ads shown.which dog sitting service is more economic to use if you need 5 hours of service? explain.

Find the value of the cosine for angle a

Which of the points a(6, 2), b(0, 0), c(3, 2), d(−12, 8), e(−12, −8) belong to the graph of direct variation y= 2/3 x?