C.<span>She used an incorrect formula. The formula should be the change in </span>y<span>-values with respect to the change in the </span>x<span>-values.
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1/15 as a decimal would be 0.6666666......
Or you can round that off to 0.67
12/11
Step-by-step explanation:
so all we have to do is flip 12/11
