SOLUTION: is the relation y=40x+30 a function? why or why not

Question 601152: is the relation y=40x+30 a function? why or why not
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

Graph your relation. If you cannot find a vertical line that touches the graph in two places, then the relation is a function.

Another way to look at it: Is there a value of the independent variable,

that would cause the function to return more than one value of the dependent variable? If not, then the relation is a function.

John

My calculator said it, I believe it, that settles it

The Out Campaign: Scarlet Letter of Atheism

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