7.6-7.7 Expo Alg Review

Determine whether the table represents an exponential function.

• yes
• no

Determine whether the table represents an exponential function.

• yes
• no

Determine whether the rule represents an exponential function.
y=5(2)^x

• yes
• no

Determine whether the rule represents an exponential function.
y = 6(x)³

• yes
• no

Determine whether the rule represents an exponential function.
y = 3x-8

• yes
• no

Determine whether the rule represents an exponential function.
y = 4(0.3)^x

• yes
• no

Evaluate the function for the given value.
f(x) = 5^x for x = 4

• 20
• 625
• 125
• 9

Evaluate the function for the given value.
h(t) = 3(4^t) for t = -3

• 0.000578
• 192
• 0.0469
• -192

Evaluate the function for the given value.
y = 8(0.7)^x for x = 3

• 175.616
• 175616
• 23.324
• 2.744

An investment of $8000 in a certain Certificate of Deposit (CD) doubles in value every seven years. The function that models the growth of this investment is f(x) = 8000(2^x), where x is the number of doubling periods. How much money will be in the account after 28 years?

• $6.5536X10¹⁶
• $128,000
• $2.147X10¹²
• $448,000