Algebra ch 7 and 8

What values of b make an exponential growth function?

• b > 0
• b <1
• b > 1
• 0 < b < 1

The equation for this table is 

• y = 1(2^x)
• y = 1(12^x)
• y = 12x
• y = 12x + 1

Identify the common ratio (multiplier) of the function f(x)=2(4)^x.

• 2
• 4
• (2)^x
• 8

In an exponential function, what does the 'a' represent?

• Slope

• Multiplier

• y-intercept

• Growth

The value of a car is $15,000 and depreciates at a rate of 8% per year. What is the decay factor (the multiplier)?

• ^.08

• ^1.08

• .92

• 8

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.

• y=5000(0.7)^x
• y=30(5000)^x
• y=5000(1.3)^x
• y=5000x^x

Find the exponential function that passes through points (0, 2) and (4, 512).

• y=2(4)^x

• y=2(3)^x

• y=4(2)²

• y=2(0.25)^x

Find the exponential equation that passes through the points (2, 3) and (4, 27).

• y=3(3)^x

• y=0.33(3)^x

• y=0.33(2)x

• y=3(0.33)^x

Find the exponential equation that passes through (0, 64) and (2, 4).

• y=64(0.25)^x

• y=256(0.25)^x

• y=64(4)^x

• y=4(64)^x

What is the y-intercept of the function?

• 2
• 3
• 1
• -2