Functions and Exponents

What is a, the starting term, for the function: f(x) = 300(1.16)^x?

• 300
• 1.16
• .16
• x

Which equation matches the graph?

• y=2(2)^x
• y=2(½)^x
• y=2^x
• y=½(2)^x

What is the domain and range?

• domain: All Real Numbers and Range: y < 0

• domain: All Real Numbers and Range: y > 0

• domain: x > 0 and Range: All Real Numbers

• domain: All Real Numbers and All Real Numbers

Which color function is exponential?

• Blue

• Green

• Red

• None

What does the a in y=a(1+r)^x  represent?

• Time
• Rate
• Slope
• Initial Amount

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• y = 15(35)^x
• y = 15(1.35)^x
• y = 15(0.35)^x
• y = 35(1.15)^x

Write the exponential equation using the table of values.

• y = 100(2)^x

• y = 2(100)^x

• y = 200(100)^x

• y = 100²

• A

• B

• C

• D

Write an equation that models the following situation:
Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.

• y=6(0.14)^x
• y=6(1+14)^x
• y=6(1.14)^x
• y=6(0.86)^x

What is the y-intercept of the function?

• 2
• 3
• 1
• -2