IM Grade 8 Unit 5 Review

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

Is this table a function or not a function? 

• Function
• Not a Function

(U5. L1.) Given the rule, what is the output if the input is 4?

• 4

• 4.5

• 6

This table corresponds to inputs and outputs. Could this represent a function rule? Select the correct answer and the correct reason.

• Function because each input has one output.

• Not a function because each input has one output

• Function because the input -2 has two different outputs.

• Not a function because the input -2 has two different outputs.

Select all true statements

• Time is a function of temperature

• The temperature was increasing between 7:00 and 9:00

• The temperature was 57 degrees twice during the 12-hour period.

• Temperature is a function of time.

Select all true statements.

• The tub was filling faster at 10:14 than at 10:01.

• At 10:06, the tub was neither filling nor draining.

• The maximum amount of water in the tub was about 35 gallons

• The amount of water in the tub stayed the same from 10:16 to 10:20.

• It took 4 minutes for the tub to drain.

So Fresh & So Clean charges money for each hour of work, plus a one-time fee. Which equation represents the cost of x hours of cleaning?

So Fresh & So Clean charges money for each hour of work, plus a one-time fee. Using the graph what is the one time fee So Fresh charges?

Name the time period where Mai gained elevation at the fastest rate.

• Mai gained elevation at the fastest rate between 0  and  22 minutes.

• Mai gained elevation at the fastest rate between 22 and  26 minutes.

• Mai gained elevation at the fastest rate between 26 and  32 minutes.

• Mai gained elevation at the fastest rate between 32 and  40 minutes.