Identifying Functions and Writing Equations of Functions

Is the relation a function? Explain.

• Yes, the x-value 11 has two y-values paired with it.

• Yes, each x-value has only one y-value paired with it.

• No, the x-value 11 has two y-values paired with it.

• No, each x-value has only one y-value paired with it.

Tags

CCSS.8.F.A.1

Does the following relation represent a function?

(1,5), (1,6), (1,7), (1,8), (1,9)

• Yes, there are no repeated x-values

• No, there are repeated x-values

Tags

CCSS.8.F.A.1

Does the table represent a function?

• Yes

• No

Tags

CCSS.8.F.A.1

Does the graph represent a function?

• Yes

• No

Is the following equation a function?

• Yes; every input has exactly one output

• No; each input will have more than one output

• Yes; it will pass the VLT

• No; the x needs to be squared

Is it a function

• Yes

• No

• Function
• Not a Function

Lee charges $3 for a basket and $2.50 for each pound of fruit picked at the orchard. Write an equation for the total cost of x pounds of fruit from the orchard.

• y = 3x + 2.5

• y = 2.50x + 3

• y = 2.50x 

• y = 3x + 2.50

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Line L is a function. The equation of line L could be

• y + 3 = 0.

• x + 3 = 0.

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Is it a function?

• Yes

• No