Use Exponential Functions Answers

Exponential functions exhibit exponential growth (or decay). What does this mean to the graphs of these functions?

A guest on a talk show tends to receive many phone calls right after she is on the show, and then the calls become less frequent. This can be represented by the equation y = 30(0.92)d, where y is the number of phone calls after d days. How many phone calls should she expect after a week?

To graph an exponential, you need to plot a few points, and then connect the dots and draw the graph. Where do you come up with values to use in the graph?

From the table below, determine whether the data shows an exponential function. Explain why or why not. x321–1y820.50.125

From the table below, determine whether the data shows an exponential function. Explain why or why not. x31-1-3y1234

From the table below, determine whether the data shows an exponential function. Explain why or why not. x36912y1248

Given the table below, determine if the data represents a linear or an exponential function and find a possible formula for the function. x 0 1 2 3 4 f (x) 18 14 10 6 2

Given the table below, determine if the data represents a linear or an exponential function and find a possible formula for the function. x 0 1 2 3 4 f(x) 0 2 4 6 8

Determine which of the following graphs represent the equation below. Also determine the y-intercept of the graph.

If $5000 is invested at an interest rate of 4% each year, what is the value of the investment in 5 years? Write an exponential function and solve.