A1.6 Practice Test on Lessons 1-9: Exponential Growth & Decay

Is the pattern linear, exponential, or something else?

• Something Else

• Linear

• Exponential

Is the pattern linear, exponential or something else?

• Linear

• Exponential

• Something Else

Is the pattern linear, exponential, or something else?

• Linear

• Exponential

• Something Else

Select all the exponential relationships.

• y=5+10x

• y=5(10)^x

• Ameer invests $500 into an account that earns $20 interest per year.

• Sam's followers on her social media are doubling each week.

• Portia invests $500 into an account that earns 2% annual interest.

Which function shows a decrease of 25%, when x increases by 1?

• y=0.25^x

• y=1.25^x

• y=0.75^x

• y=25^x

Which function shows an increase of 25%, when x increases by 1?

• y=0.25^x

• y=1.25^x

• y=0.75^x

• y=25^x

Initially, a piece of bread has 3 square millimeters of mold. The mold grows by 40% each day.

How much mold will be on the bread after 5 days?

• 11.525 sq mm

• 16.135 sq mm

• 1.2 sq mm

• 3.65 sq mm

Which function correctly models the graph?

Tomas drank coffee that had 100mg of caffeine.

This graph shows the number of milligrams of caffeine left in his body after x hours.

What percent of the caffeine was left after 1 hour?

• 4%

• 40%

• 6%

• 60%

Marine biologists worked to conserve the population of a coral reef from 2015-2020.

The graph shows the volume of the coral reef.

What percent of the coral reef's volume was present after 1 year?

• 80%

• 40%

• 140%

• 180%