Question 227937
Take a look at the following table: 
x -2 -1 0 1 2

f(x)-5 -2 1 4 7
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Note: As x increases 1, f(x) increases 3; so the slope is 3
Note: When x is zero, f(x) is -2 ; so the intercept is -2
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a. Write out an equation for f(x). Assume the function is linear
f(x) = 3x-2
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b. What is the slope? Is it negative or positive? What information do we get from the slope?
Slope = 3 ; positive ; as x increases 1, f(x) increases 3.
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Cheers,
Stan H.