What is the first step in sketching the graph of a rational function?
o
a. choosing test numbers to the left and right of each of the
function's zeros and finding the value of the function at each test
number
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b. using test numbers to find where the function is positive and
where it is negative
o
c. finding the function's zeros and vertical asymptotes and plotting
them on a number line
o
d. sketching the function's graph and plotting additional points as
guides when needed
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