Exponential Math Review

What is the y-intercept of the function?

• 2

• 3

• 1

• -2

What is the x-intercept of the exponential function? 

• (0,1)

• (0,0)

• There is not one

Evaluate f(0) for f(x)= -3(3)^x

• -3

• -9

• 0

• -1

Based on the graph, which statement does not appear to be true?

• The graph has a horizontal asymptote at y=0

• The y-intercept is at the point (0, 3)

• The graph represents exponential growth.

• The graph of the function shows a decrease over time.

• y = 1,000(1.12)^x

• y = 1,000(0.12)^x

• y = 1,000 + 1.12x

• y = 1,000 + 0.12x

• y = 2x

• y = 6x – 8

• y = 2^x

• y = 4^x

Which is an equation of the exponential function that goes through the points (1, 10) and (3, 2.5)?

• y = 20(0.5)^x

• y = 20(2)^x

• y = 5(0.5)^x

• y = 5(2)^x

• y = 1.5(1,266)^x

• y = 1,266(1.5)^x

• y = 1.05(1,266)^x

• y = 1,266(1.05)^x

Marcus dropped a ball from a height of 400 cm. The sequence below shows the height of the ball, in cm, during its first four bounces. 240, 144, 86.4, 51.84, ... Which formula could be used to determine the height of the ball after n bounces?

• h(n) = 400(0.60)ⁿ

• h(n) = 400(0.60)^{(n – 1)}

• h(n) = 240(0.60)ⁿ

• h(n) = 240(0.60)^{(n – 1)}

What is the y-intercept of the graph of f(x) = 2(1.5)^x +3?

• 2

• 3

• 4

• 5