Functions and Tables

• Function

• Not a Function

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

If my function rule is y = x + 3, what is the OUTPUT if the input is 4?

• 4

• 3

• 7

• 10

If my function rule is y = 4x, what is the OUTPUT if the input is 5?

• 45

• 54

• 9

• 20

If my function rule is y = 2x + 1, what is the OUTPUT if the input is 2?

• 5

• 4

• 22

• 23

Using the rule y = x - 6

What is the missing number?

• 12

• 10

• 14

• 13

Find the missing OUTPUT value.

• 8

• -2

• 2

• -8

What is the rule in this table?

• Multiply the number of days by 7 and add 1

• Add 7 to the number of days

• Multiply the number of days by 4 and add 4

• Add 13 to the number of days

For the function rule y = -2x + 3: If the input is 4, what is the output?

• 5

• 11

• -5

• -11

A taxi service charges $2.50 plus $0.75 per mile. The function y=0.75x+2.50 represents the total cost, y, of a taxi ride for any number of miles, x.

Which types of numbers are appropriate input (x) values for the given situation?

• positive whole numbers only

• integers (positive or negative whole numbers)

• any positive rational number (including fractions and decimals)

• any real number