Math Models Unit 1 Review

This graph is an example of:

• Positive linear correlation

• Negative linear correlation

• Exponential Growth

• Exponential Decay

This graph is an example of:

• Positive linear correlation

• Negative linear correlation

• Exponential Growth

• Exponential Decay

This graph is an example of:

• Positive linear correlation

• Negative linear correlation

• No association

• Exponential Decay

y = a(1+r)^t

This is the equation for:

• exponential decay

• exponential growth

• linear regression

• quadratic function

y = a(1 - r)^t

This is the equation for:

• exponential decay

• exponential growth

• linear regression

• quadratic function

A certain radioactive element decays exponentially at a rate of 5% a year. Initially the mass is 50 grams. Which is the best approximation of the mass of the element after 20 years?

• 25.00 grams
• 17.92 grams
• 40.00 grams
• 10.00 grams

In a town with a population of 2,000 which is increasing exponentially at a rate of 10%, what is the population after 5 years?

• 3,100
• 3,000
• 3,221
• 3,500

Which function below is an example of a linear function

• y = 4x + 4

• y = 4x² - 8

• y = 4x³ + 4x²

• y = 4^x

Which function below is an example of a quadratic function

• y = 4x + 4

• y = 4x² - 8

• y = 4x³ + 4x²

• y = 4^x

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