For question 5, to make the cab company's charges a non-proportional situation, the correct response is:
Charge a flat rate of $20 and then $12 per mile.
This introduces a flat fee, which makes the total cost not directly proportional to the miles driven.
For question 6, to transform the first business's graph to make it become a non-proportional graph with the same y-intercept as the second graph, the correct response is:
Down 6.
Since we need the first graph (which starts at $22 per t-shirt) to match the second graph (which starts at $15 plus $16 per t-shirt), we need to shift it down so the starting prices equal the total upfront cost of $15 (setup fee) plus the $16 per t-shirt, resulting in the same y-intercept.
Please let me know if you have more questions!