Exponential Quiz

Whats the horizontal asymptote?

• (0,3)

• y=3

• y=-2

• y=2

What is the domain?

• (-∞, ∞)

• (0, ∞)

• (-∞, 0)

• [0, ∞)

Compare f(x) = 3^x- 4 with the basic function g(x) = 3^x

• 4 units up

• 4 units to the left

• 4 units to the right

• 4 units down

What is the end behavior of the graph?

• x → -∞, y →+∞

  x → +∞, y →-∞

• x → - ∞, y → 3

  x → + ∞, y → + ∞

• x → -∞, y → + ∞

  x → + ∞, y → - ∞

• (-∞, +∞)

Whats the horizontal asymptote?

• y=3

• y=-2

• y=-3

• (0,-3)

What is the growth rate of the function f(x) = 2(1.65)^x

• 165%

• 65%

• 6.5%

• 35%

Is the pictured graph growth, decay, or linear or none?  

• Growth

• Decay

• Linear

• None

A new savings account is opened with $400 and gains 3% every year. What is the exponential function that represents this situation?

• f(x)=400(1+3)^x

• f(x)=400(1-0.03)^x

• f(x)=400(1+0.03)^x

• f(x)=400(0.03)^x

Identify the y-intercept (initial value) of the function f(x)=2(4)^x.

• 2

• 4

• (2)^x

• 8

The amount of ants in a colony, f, that is decaying can be modeled by                      f(x) = 800(.87)^x, where x is the number of days since the decay started. By what percentage is the colony decaying?

• 87%

• 13%

• 800%

• 8.7%