Exponential Equations Review Percent

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

• Exponential Growth
• Exponential Decay
• Linear
• None of the above

Is y = 54(.20)^x growth or decay?

• Growth because of the 54
• Decay because of the .20
• Decay because of the 54
• Growth because of the .20

y = 3(2)^4x is equivalent to which of the following

• y = 81(16)^x
• y = 3(8)^x
• y = 3(16)^x
• y = 3(1/2)^4x

Is y = 54(.65)^-x growth or decay?

• Growth because of the 54
• Growth because of the .65
• Decay because of the .65
• Growth because of the negative exponent

What type of equation is represented by this table?

• Exponential growth
• Linear
• Exponential Decay
• None of the above

What is the starting amount for the following function:
f(x) = 3(1/3)^x 

• 0
• 1/3
• 1
• 3

Is the graph linear, exponential or neither?

• Linear
• Exponential
• Neither

You have inherited land that was purchased for $30,000 in 1990. The value of the land increased by approximately 5% per year. What is the approximate value of the land in the year 2011?

• $83,579
• $10,217
• $14,963,655
• $28,500

An adult takes 400 mg of ibuprofen. Each hour, the amount of ibuprofen in the person’s system decreases by about 29%. 
What is the number inside the parentheses for this problem?

• 1.29
• .71
• .29
• 1.71

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