Intro to Functions

How would you write y = 2x - 3 in function notation?

• y = 2x-3

• f = 2x - 3

• f(x) = 2x-3

Tags

CCSS.HSF.IF.A.2

Is this a function? Explain.

• Yes; it passes the horizontal line test.

• No; it is not a straight line.

• Yes; it passes the vertical line test.

• No; it does not pass the vertical line test

Is this graph a function or not a function? 

• Function

• Not a Function 

Does the table represent a function?

• Yes, the x-value 2 repeats. 

• No, there aren't any repeated y-values. 

• Yes, the y-value 4 repeats. 

• No, the x-value 2 repeats. 

Tags

CCSS.8.F.A.1

f(x) is the same thing as ______.

• y

• x

• input

• an equation

Tags

CCSS.HSF.IF.A.1

If a question asks you to find f(2), what does that mean?

• Let x = 2

• Let y = 2

Tags

CCSS.HSF.IF.A.2

If f(x) = 2x + 1, find f(1).

• f(1) = 1

• f(1) = 4

• f(1) = 0

• f(1) = 3

Tags

CCSS.HSF.IF.A.2

Is y a function of x?

• function

• not a function

Is y a function of x?

• function

• not a function

Which graph represents a function?

• 
• 
• 
•