4-6 Formalizing Relations

 From the equation,  $y\ =\ 3x\ +\ 5$  , what is the change?

• 3

• 5

• x

• y

You baby-sit for $5 per hour and get a $7 tip. Your earnings, E, are a function of the number of hours, h, you work. What is the equation to model the situation?

• $E=7h\ +5$

• $E=5h+7$

The rate of change can occur multiple times.

• True

• False

Your pipes under the sink burst and are in need of a plumber. His labor charge to fix the break is an appointment fee of $75 and then $40 for every hour worked. What is the equation to represent the cost to hire the plumber?

• $C=75x+40$

• $C=40x+75$

At a bicycle motorcross track, you pay $30 for the racing license plus $15 per race. What is a function rule that represents your total cost? Use C to represent the total cost and r for the number of races. (No spaces)

 $\left(2,4\right),\ \left(3,5\right),\ \left(5,6\right)$  

Is the following relation a function?

• function

• not a function

What number can we replace with ?? to make the relation NOT a function?

• 0
  

• 1

• 2

• 5

Given the function  $f\left(x\right)=3x\ +\ 9$  , evaluate f(4).

Given the function $h\left(x\right)=3x+5$  , evaluate h(-2).

The range are the..........(Check all that apply)

• y values

• output values

• x values

• domain values