Creating a Function

Select the linear function.

• y=2x

• y= x^2

• y= 2^x

What is the definition of function?

• Has inputs and outputs

• Every input has only ONE output

• Inputs have different outputs every time

• x-values and y-values

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)

• (3,4) (4,-3) (7,4) (3, 8)

• (6,-5) (7, -3) (8, -1) (9, 1)

• (2, -2) (5, 9) (5, -7) (1, 4)

Which of the following represents a function?

Sam joins a chocolate club for $22.  He pays $0.35 per ounce of chocolate after he has paid the membership fee. What function represents this situation?

• f(x) = 0.35y + 22

• f(x) = 0.35x - 22

• f(y) = 0.35x + 22

• f(x) = 0.35x +22

• Function
• Not a Function

• Function
• Not a Function

The school booster club is in charge of a new set of sweatshirts for the new school year. A local business charges $40 to set up the logo with the design and $4.50 in materials per sweatshirt printed. Write a function to represent the average cost per sweatshirt.

Is this set of ordered pairs a function or not a function? 

• Function

• Not a Function 

Which two functions have a graph that is a line?

• y = 3/x + 2

• y = 2x²– 9x

• y = –3^x

• y = 2x – 9

• y = –6x/7