Math In Restaurants Worksheet With Answers Page 4

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Answer Key
Math in Restaurants: Take the challenge
Q-points or vertices at (9, 32) and (26, 45)
m =
or 0.765
Sample equation of the line in point-slope form: (y – 32) =
(x – 9)
Analyze the trend line to predict the prices for the next FOURTEEN months.
Your prediction:
The average cost of one case of avocados in the next 14 months will be: _______________
The average cost of ONE avocado in the next 14 months will be: _____________________
Note: A range of answers is acceptable here. See “Possible Strategies and Solutions” below.
Explain your reasoning:
Is your line of fit a good representation of the data? If not, try finding another line that
better fits the data. If so, explain why your line is a good representation of the data.
B. RECOMMEND A MENU PRICE:
1. Identify what you know. Use Sue’s Rule of Thumb for menu pricing:
_____________________ + _$.40___________ = ___________________
Average cost of one avocado
additional ingredients
total cost of ingredients
(for the next 14 months)
Note: A range of answers is acceptable here. See “Possible Strategies and Solutions” below.
Total cost of ingredients x 4
Menu price for guacamole *
*Round your answer to the nearest dollar or half-dollar.
2. Plan it out. Set up your problem.
3. Solve your problem. Show all your steps.
Possible Strategies and Solutions:
[Solutions may vary according to average cost predicted.]
Using Strategy A:
• Estimate $59 per case:
o Average cost= $59:00 per case (of 48 avocados)
o 59/48 avocados = $1.23 (average cost of one avocado)
o $1.23 + .40 = $1.63. (Total Cost of ingredients)
o For rule of thumb (times 4) use $1.63 x 4 = $6.52 or about $6.50 (menu price).
Or
4

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