Which of the following expressions represents a function? A. y = x2
B. {19, 2), (4, -2), (5,3), (9,-4)}
C. x=-3
D. x²= 25 - y²

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2