A local retailer has determined that the number x of PortaBoy game systems sold in a week is related to the price pp in dollars of each system. 105 game systems were sold when the price was $140. When the systems went on sale the following week, 210 systems were sold at $80 a piece.
1) Find a linear function which fits this data. Use the weekly sales x as the independent variable and the price p as the dependent variable.
2) Find a suitable applied domain:
3) If the retailer wants to sell 315 PortaBoys next week, what should the price be?
Answer: p=__________ dollars
2)A car rental company offers two plans for renting a car.
Plan A: $38 per day and unlimited mileage
Plan B: $22 per day plus $0.20 per mile
Use an inequality to find the number of daily miles for which plan B costs more than plan A.
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Let x represents the number of portaboy game and p represents the price in dollars of each system.
When x = 105 then p = 140.
Then the point is (105, 140).
When x =210 then p = 80.
The point is (210,80).
To find a linear function, obtain the slope for the above 2 points.
Let the linear equation be p(x) = mx + c.
Substitute the valu...
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