Recognizing functions from tables | |
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Description | |
Exercise Name: | Recognizing functions from tables |
Math Missions: | 8th grade (U.S.) Math Mission, Algebra I Math Mission, Mathematics II Math Mission |
Types of Problems: | 3 |
The Recognizing functions from tables exercise appears under the 8th grade (U.S.) Math Mission, Algebra I Math Mission and Mathematics II Math Mission. This exercise begins to recognize what makes a relation a function.
Types of Problems
There are three types of problems in this exercise:
- Use the vertical or horizontal line test: This problem has a graph and the user is expected to look at the graph and determine if one variable is a function of the other.
- Solve to see if an equation is a function: This problem provides an equation and asks users to state whether or not it represents a function.
- See if chart is a function: This problem provides a chart and asks users to determine if the chart represents a function.
Strategies
Knowledge of function notations and the various forms of functions are an advantage when trying to complete this exercise.
- A function must be assigned a unique output for any input.
- For graphical situations, a graph is a function of y in terms of x if it passes the vertical line test. It is a function of x in terms of y if it passes the horizontal line test.
- In a chart, a function will not have repeated x-values going to different y-values.
- In a rule, a function can be isolated for y.
Real-life applications
- Functions are the building blocks of much of the calculus.
- Functions can be used to model many aspects of business and science.