Solving Functions

Solving Functions

By Aimee Norman

Multiple Choice

For the function {(0,1), (1,-3), (2,-4), (-4,1)}, write the domain and range.

• D: {1, -3, -4,}
  R: {0, 1, 2, -4}
• D:{0, 1, 2, -4}
  R:{1, -3, -4}
• D:{0, 1, 2, 3, 4}
  R:{1, -3, -4}

Multiple Choice

Is this mapping a function or not a function? 

• Function
• Not a Function

Multiple Choice

Which ordered pair could you add to the following list of points to create a function?  (3, 5) (4, 9) (2, 5) 

• (3, 7)
• (4, 1) 
• (1, 9)
• (2, 6)

​Solving Functions

​Solve f(x)= 2x+3 if f(x)=5

1) COPY THE ORIGINAL
2) Replace the x with the given number
3) Solve

Multiple Choice

Evaluate f(-5) if f(x) = -2x - 12

• -22
• -2
• -19
• -5

Multiple Choice

Evaluate f(-2) if f(x) = x+3

• -1
• 1
• 5
• -5

Multiple Choice

f(x)=4x-22 solve for f(10)

• 62
• 18
• 100

Multiple Choice

given g(x)= 5x+7 find g(10)

• 120
• 66
• 57

Fill in the Blanks

​A holiday meal costs $12.50 a person plus a delivery fee of $30.  Which function represents the amount a holiday meal costs, including delivery, for x people?

​1) Look for the "multiplication" (per, a, each, every)
2) Look for any other operations (add or subtract)
3) put it all together

Multiple Choice

A holiday meal costs $12.50 a person plus a delivery fee of $30.  Which function represents the amount a holiday meal costs, including delivery, for x people?

• M(x) = 30 + 12.5x 

• M(x) = 12.5 + 30

• M(x) = 12.5 + 30x

​A holiday meal costs $12.50 a person plus a delivery fee of $30.  Which function represents the amount a holiday meal costs, including delivery, for x people?

​1) Look for the "multiplication" (per, a, each, every)

12.5x

2) Look for any other operations (add or subtract)
3) put it all together

​A holiday meal costs $12.50 a person plus a delivery fee of $30.  Which function represents the amount a holiday meal costs, including delivery, for x people?

​1) Look for the "multiplication" (per, a, each, every)

12.5x

2) Look for any other operations (add or subtract)

+30

3) put it all together

​A holiday meal costs $12.50 a person plus a delivery fee of $30.  Which function represents the amount a holiday meal costs, including delivery, for x people?

​1) Look for the "multiplication" (per, a, each, every)

12.5x

2) Look for any other operations (add or subtract)

+30

3) put it all together

12.5x+30

Multiple Choice

The price p of plain pizza is $15.00 plus $9.00 for each topping t on the pizza.

• p = 9t - 15

• p = 9t + 15

• p = 15t + 9

Multiple Select

Rufus collected 100 pounds of aluminum cans to recycle. He plans to collect an additional 25 pounds each week. Write the equation for the total pounds, P, of aluminum cans after w weeks. How many pounds did he collect after 12 weeks?

• P = 100w + 25

• 400

• 600

• P = 25w + 100

Multiple Select

For babysitting, Clara charges a flat fee of $15, plus $5 per hour. Write an equation for the cost, C, after h hours of babysitting. How much money will she make if she baby-sits 5 hours?

• C = 15h + 5

• C = 5h + 15

• $80

• $40

Multiple Select

A water tank already contains 55 gallons of water when Baxter begins to fill it. Water flows into the tank at a rate of 8 gallons per minute. Write a linear equation to model this situation. Find the volume of water in the tank 25 minutes after Baxter begins filling the tank.

• 255

• y = 8x + 55

• 1383

• y = 55x + 8