Linear Functions

In the equation, y = mx + b, the letter b is the ___________.

• y-intercept

• x-intercept

• slope

• rate of change

What is the slope of the equation?
y = -3x + 4

• -3

• 3

• 4

• -4

Which is the graph of y= -x + 2?

• A

• B

• C

• D

What type of slope does the graph have?

• Zero

• Undefined

• Negative

• Positive

Is the relation a function? Why.

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

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

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

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

• Function

• Not a Function

Is this graph a function or not a function? 

• Function

• Not a Function

Is this mapping a function or not a function? 

• Function

• Not a Function 

Bob has $150 in his savings account and saves $40 per month. Which function models his savings?

• y = 150 + 40

• y = 40x + 150

• y = 150x + 40

A golf course charges $15 to rent golf clubs and charges $25 per round to play.  Write an equation to represent the total cost, T, for one player.

• T = 15 + 25r

• T = 15g + 25r

• T = 40 r

• T = 15r + 25