Yes, this is a linear equation with a constant rate of change (a slope) so the sets of values of the graph are proportional
$10.50 gets taken off the original price. I divided $42 by 4 because 25 is 1/4th of 100. This got me $10.50. The original price ($42) minus $10.50 equals $31.50. So the item sells for $31.50!!!!
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2. A
3. False
4.False
5. D
6. 18
