Answer: A
Step-by-step explanation:
if we look at the chart for A,
in the first row...
we see that the teacher brought 3 sets of markers.
If 1 set is $3, then 3 sets is $9 (<-- 3*3).
Now we know that the teacher has a $2-off coupon, so 9 - 2 = $7
we will repeat this with 12 sets
in the third row...
If 1 set is $3, then 12 sets is $36 (<--12*3)
We will use now the teacher's $2-off coupon, so 36 - 2 = $34
these values are correctly shown on chart A, therefore the correct answer is
A.