SOLUTION: How do you know what number to substitute for x in a function? example: f(x)=4-9x+3x^2

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Question 50415This question is from textbook College Algebra
: How do you know what number to substitute for x in a function?
example: f(x)=4-9x+3x^2 This question is from textbook College Algebra

Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
The value of x must be given to you in the problem. Or if you are trying to graph the function, you have to make up enough values of x and find the corresponding values of the function in order to draw the graph.

R^2 at SCC