Math Problem Statement

If it costs Microsoft $4,110 to manufacture 8 XBox Series X consoles in an hour and $8,190 to manufacture 16 in an hour at a particular plant, obtain the corresponding linear cost function, with C(x) in dollars.† C(x) =

What was the cost (in dollars) to manufacture each additional console? $ Use the cost function to estimate the cost (in dollars) of manufacturing 35 consoles in an hour. $

Solution

We are given two points corresponding to the number of consoles and their respective cost. These points are:

  • (x1,C1)=(8,4110)(x_1, C_1) = (8, 4110)
  • (x2,C2)=(16,8190)(x_2, C_2) = (16, 8190)

Step 1: Find the slope of the linear function

The cost function C(x)C(x) is linear, so it has the form:

C(x)=mx+bC(x) = mx + b

where mm is the slope and bb is the y-intercept. The slope mm can be calculated using the formula:

m=C2C1x2x1m = \frac{C_2 - C_1}{x_2 - x_1}

Substituting the given values:

m=81904110168=40808=510m = \frac{8190 - 4110}{16 - 8} = \frac{4080}{8} = 510

So, the slope is m=510m = 510. This means that the cost to manufacture each additional console is $510.

Step 2: Use the slope to find the y-intercept

We now substitute one of the points (for example, x=8x = 8 and C(x)=4110C(x) = 4110) into the equation C(x)=510x+bC(x) = 510x + b to find the y-intercept bb:

4110=510(8)+b4110 = 510(8) + b 4110=4080+b4110 = 4080 + b b=41104080=30b = 4110 - 4080 = 30

So, the y-intercept is b=30b = 30.

Step 3: Write the cost function

Now that we have both the slope and the y-intercept, the cost function is:

C(x)=510x+30C(x) = 510x + 30

Step 4: Estimate the cost of manufacturing 35 consoles

To estimate the cost of manufacturing 35 consoles, substitute x=35x = 35 into the cost function:

C(35)=510(35)+30=17850+30=17880C(35) = 510(35) + 30 = 17850 + 30 = 17880

So, the estimated cost to manufacture 35 consoles is $17,880.


Do you want more details or have any questions?

Here are some related questions:

  1. How would the cost function change if the cost for 16 consoles were $9,000?
  2. What is the break-even point if the selling price per console is $600?
  3. How would you interpret the y-intercept of this cost function?
  4. What would the cost function be if the price per additional console decreased by $20?
  5. How does changing the slope affect the overall manufacturing cost?

Tip: In linear cost functions, the slope represents the variable cost per unit, while the y-intercept represents the fixed cost of production.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Functions
Slope-Intercept Form

Formulas

Slope formula: m = (y2 - y1) / (x2 - x1)
Linear cost function: C(x) = mx + b

Theorems

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Suitable Grade Level

Grades 9-12