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IM Alg1.6.4 Lesson: Comparing Quadratic and Exponential Functions

List these quantities in order, from least to greatest, without evaluating each expression. Be prepared to explain your reasoning.

  • In Pattern A, the length and width of the rectangle grow by one small square from each step to the next.
  • In Pattern B, the number of small squares doubles from each step to the next.
  • In each pattern, the number of small squares is a function of the step number, .
Pattern APattern B

 Write an equation to represent the number of small squares at Step  in Pattern A.

Is the function linear, quadratic, or exponential?

Write an equation to represent the number of small squares at Step  in Pattern B.

Is the function linear, quadratic, or exponential?

Complete the table where f represents Pattern A and g represents Pattern B.

How would the two patterns compare if they continue to grow? Make 1–2 observations.

Here are two functions:

 and . Investigate the output of  and  for different values of . For large enough values of , one function will have a greater value than the other. Which function will have a greater value as  increases?

Support your answer with tables, graphs, or other representations.

Jada says that some exponential functions grow more slowly than the quadratic function as  increases. Do you agree with Jada? Explain your reasoning.

Could you have an exponential function  so that < for all values of .