Neil took 3 math tests this year. The number of hours he spent studying for each test and the corresponding grades he earned are shown in the
table. Is the relation of hours of study time to grade earned on a test a
function? Explain why. Use the graph to justify your answer.

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)