Exponential Growth Models

The function shows the growth of a fruit fly population. f(t) is the number of fruit flies after t days. 
What is the growth factor for the fruit fly population?

When will the fruit fly population reach 250 flies?

• Between 17 and 18 days

• Between 18 and 19 days

• Between 19 and 20 days

• Between 20 and 21 days

The y-intercept in the exponential function is...

Identify the equation that best models the growth of Species X

Will Species X reach a population of 1215 in year 5?

• Yes, the point (5, 1215) is a solution on the graph.

• No, the point (5, 1215) is NOT a solution on the graph.

Does the table show an exponential function pattern?

• Yes, there is a constant factor of 3

• Yes, there is a constant factor of 4

• No, it is linear there is a constant rate of change of 4

• No, there is no pattern

How many fruit flies are in the population after 7 days (1 week)?

• 140 flies

• 105 flies

• 101 flies

• 735 flies

The growth factor in the exponential function is...

Select the graph(s) that show an exponential function.

• 
• 
• 

Find the growth factor for Species X.

• 5

• 15

• 3

• 10