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IM 8.5.2 Practice: Introduction to Functions

Author:GeoGebra Classroom Activities, IM 6 – 8 Math

Here are several function rules. Calculate the output for each rule when you use -6 as the input.





A group of students is timed while sprinting 100 meters. Each student’s speed can be found by dividing 100 m by their time. Is each statement true or false?

Speed is a function of time.

Select all that apply
  • A
  • B
Check my answer (3)

Explain your reasoning.

Time is a function of distance.

Select all that apply
  • A
  • B
Check my answer (3)

Explain your reasoning.

Speed is a function of number of students racing.

Select all that apply
  • A
  • B
Check my answer (3)

Explain your reasoning.

Time is a function of speed.

Select all that apply
  • A
  • B
Check my answer (3)

Explain your reasoning.

Diego’s history teacher writes a test for the class with 26 questions. The test is worth 123 points and has two types of questions: multiple choice worth 3 points each, and essays worth 8 points each.

How many essay questions are on the test?

Explain or show your reasoning.

These tables correspond to inputs and outputs.

Which of these input and output tables could represent a function rule?

Select all that apply
  • A
  • B
  • C
  • D
Check my answer (3)

Explain or show your reasoning.

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