exponential functions

Which of the following is an exponential function?

• y = x²

• f(x) = 3x³

• y = x³

• f(x) = 3^x

What is the initial value in y=4(2)^x

• 4

• 2

• x

What is the y-intercept in y=4(2)^x

• (4,0)

• (0,2)

• x

• (0,4)

• (4,2)

What is the starting amount in the problem below?

f(t) = 300(1.05)^t

• 300

• 1.05

• t

• y

What is the growth rate in the problem below?

f(t) = 300(1.05)^t

• 300

• 1.05

• t

• y

The y-intercept for any function in the form

y=b^x

• (0,0)

• (0,1)

• (1,0)

Select the functions that are exponential growth.

If the functions is growing at a rate of 3%, the b value is _____.

If the functions is growing at a rate of 2.7%, the b value is _______.

If the function is DECAYING at a rate of 16%, the b value is ______.