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Solving MCAS Open Response Questions By Lawrence Scandone

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Solving MCAS Open Response Questions By Lawrence Scandone READ THE QUESTION Read it Again What info have I been given? 1st $200 dollar expence for equipment. – PowerPoint PPT presentation

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Title: Solving MCAS Open Response Questions By Lawrence Scandone


1
Solving MCAS Open Response QuestionsBy Lawrence
Scandone
2
READ THE QUESTION
3
Read it Again
4
What info have I been given?
  • 1st 200 dollar expence for equipment.
  • 2nd Rodney earns 40 dollars for each horse that
    he grooms.
  • 3rd Profit is equal to his earnings for each
    horse groomed minus the initial expense.

5
What is the profit for grooming 15 horses?
  • 1st Rodney earns 40 dollars for each horse
    groomed.
  • 2nd He groomed 15 horses.
  • 3rd So I multiply 40 x 15 which is 600.
  • 4th Since profit I E P 600 - 200
  • Profit 400

6
Graph Title
Title______________________________
__
7
Label the X-axis
Name_______________________________
8
Label the Y- axis
Name
9
Plot the Profit for 0 to 7 horses
  • X of horses
  • Groomed (0 to 7)
  • Y Rodneys profit

Y
200
0
X
2
4
6
8
-200
10
Write the equation
  • Y mX b
  • 1st ask yourself what m __
  • 2nd ask yourself what b __

11
M stands for the slope
  • Its equal to the rise/ run or the rate of change
    which is 40.

12
B stands for the Y-intercept
  • Its where the graph crosses the y- axis or in
    this case a one time charge, which is the
    starting value.

13
Replace m and b
  • You plug 40 in for m and you replace b with (-
    200).
  • Y 40X 200 is the equation

14
What does the X-interceptrepresent?
  • Think about money!
  • What is Rodneys profit at the X-intercept?
  • How many horses did he groom at the
  • X-intercept
  • Show and explain your answer for this point on
    the graph. What does it stand for in terms of
    Rodneys business?

15
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