# 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.p(x)=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 mileUse an inequality to find the number of daily miles for which plan B costs more than plan A.

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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.

p(x)=

2) Find a suitable applied domain:

3) If the retailer wants to sell 315 PortaBoys next week, what should the price be?

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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Step 1

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Step 2

1.

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.

Step 3

Let the linear equation be p(x) = mx + c.

Substitute the valu...

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