Problem - Thinking. Show your work for full m 20. Solomon earns $9.25/hour working in a pizza shop and $17/hour as a waiter. He earned $573 in a week. a) Explain why 9.25x + 17y = $73 models this case. (1) b) Is the relation linear? Explain. (2) c) Determine the x- and y-intercepts. What do they mean? (3) d) How many hours might Solomon have worked in each store? (2) Problem - Communication. Show your work for full marks. 21. Pasquale's cell phone plan charges him monthly using the relation y = 0.25x + 20, where y is the total monthly bill and x is the number of minutes he used for the month. a) Which variable is independent and which is dependent? (2) b) How do you know the relation is linear? (1) c) Determine the rate of change in his monthly bill. (1) d) What does the rate of change mean? (1) e) How does the rate of change relate to the equation? (1) f) When will his cell phone bill reach $100? (2)