Lesson 2
Introduction to Functions
Problem 1
Here are several function rules. Calculate the output for each rule when you use -6 as the input.
Solution
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Problem 2
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? Explain your reasoning.
- Speed is a function of time.
- Time is a function of distance.
- Speed is a function of number of students racing.
- Time is a function of speed.
Solution
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Problem 3
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.
Solution
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(From Unit 4, Lesson 15.)Problem 4
These tables correspond to inputs and outputs. Which of these input and output tables could represent a function rule, and which ones could not? Explain or show your reasoning.
Table A:
input | output |
---|---|
-2 | 4 |
-1 | 1 |
0 | 0 |
1 | 1 |
2 | 4 |
Table B:
input | output |
---|---|
4 | -2 |
1 | -1 |
0 | 0 |
1 | 1 |
4 | 2 |
Table C:
input | output |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
Table D:
input | output |
---|---|
0 | 1 |
0 | 2 |
0 | 3 |
Solution
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