Rate of Change Answers

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

What is the average rate of change in f(x) over the interval [4,13]?

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?

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 180 when x is n and y is n when x is 5, what is the value of n?

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?

The graph shows the distance a ball has traveled x seconds after it was thrown. What is the average speed between 2 seconds and 8 seconds.

Which relation is a direct variation that contains the ordered pair (2, 7)?

The height, h, of a falling object t seconds after it is dropped from a platform 300 feet above the ground is modeled by the function . Which expression could be used to determine the average rate at which the object falls during the first 3 seconds of its fall?

If y varies directly as x, and y is 20 when x is 4, what is the constant of variation for this relation?