This is a classic data-analysis question, and it involves two steps. First, you need
to be able to read the graph, then you need to determine whether the data is
absolute or approximate. We can see from the answer choices that we are
looking at the $9 mark. So go to $9 on the y-axis, then move to the right to see
where it hits the line of best fit. It finds the line at approximately 7 inches on the
x-axis. Now, will a 7-inch cruller always cost $9? No, this is the line of best fit; it
is an approximation. Our answer is B.
tuis.
(Tuis.)
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