Exponential Functions Mastery Quiz

Which of the following is an example of an exponential function?

• A straight line that passes through the origin

• A parabola opening upwards

• A curve that gets closer to the x-axis as x decreases and rises steeply as x increases

• A curve that gets closer to the y-axis as x decreases and flattens out as x increases

Which of the following represents exponential decay?

• 2

• 3

• 6

• 0

• The function represents exponential decay.

• The function has no y-intercept.

• The function represents exponential growth.

• The function is decreasing for all values of x.

• The initial value of the function

• The rate of exponential growth

• The rate of exponential decay

• The x-intercept of the function

• It is a reflection across the y-axis.

• It is a reflection across the x-axis.

• It is a reflection across the y-axis and less steep.

• 0

• 1

• 4

• It does not have a y-intercept.

If a quantity decreases by 20% each year, which function models this situation?