Determining if Equations are Functions
This lesson teaches how to determine if an equation represents a function relationship. The criteria to be met includes everything in 'x' being mapped to a 'y', and the 'x' values should have a unique corresponding 'y' value. The first step is to isolate 'y' by solving for it, then taking the square root. The square root can result in 2 possible values for 'y,' which means that the input now has multiple possible values, making it not a function relationship between 'y' and 'x.'
Determine if the equation represents a function
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- How can I tell if an equation is a function or not?
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Staff Review
This video shows an example of one equation. The instructor demonstrates why the equation does not represent a function.
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