Rate of Change Answers

If y varies directly as x, and y is 12 when x is 1.2, what is the constant of variation for this relation?

Maria created a graph of B(t), the temperature over time. For the interval between t = 3 and t = 7, the average rate of change in her graph of B(t) is 8. Which statement must be true?

The average rate of change of g(x) between x = 4 and x = 7 is . Which statement must be true?

If y varies directly as x, and y is 48 when x is 6, which expression can be used to find the value of y when x is 2?

T(d) is a function that relates the number of tickets sold for a movie to the number of days since the movie was released. The average rate of change in T(d) for the interval d = 4 and d = 10 is 0. Which statement must be true?

If y varies directly as x, and y is 180 when x is n and y is n when x is 5, what is the value of n?

Calculate the average rate of change of a function over a specified interval. Which expression can be used to determine the average rate of change in f(x) over the interval ?

If y varies directly as x, and y is 6 when x is 72, what is the value of y when x is 8?

If y varies directly as x, and y is 400 when x is r and y is r when x is 4, what is the numeric constant of variation in this relation?

If y varies directly as x, and y is 18 when x is 5, which expression can be used to find the value of y when x is 11?