SOLUTION: When substituting for a variable in a function graph, how do I select the correct substitution for the variable. Example: f(x)=-7(x) When making a graph, I am not sure how to

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Question 140887: When substituting for a variable in a function graph, how do I select the correct substitution for the variable.
Example: f(x)=-7(x)
When making a graph, I am not sure how to get the input, and output.
Answer by stanbon(57219) About Me  (Show Source):
You can put this solution on YOUR website!
When substituting for a variable in a function graph, how do I select the correct substitution for the variable.
Example: f(x)=-7(x)
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You give a value to x and find a value for f(x) based on the equation.
For example:
If x = 0, y = -7*0 = 0
If x = 2, y = -7*2 = -14
If x = 100, y = -7*100=-700
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Cheers,
Stan H.