Function Notation and Comparing Graphs

Is this set of ordered pairs a function or not a function?

• Function

• Not a Function 

• 4

• 3.5

• 2

• 0

• x=3

• x= 0.5

• x= -3.5 and 0.5

• x=0

Given the function below, what is the independent variable?

• The height of the plant (x-axis)

• The height of the plant (y-axis)

• Number of weeks (x-axis)

• Number of weeks (y-axis)

Given the function below, what is the dependent variable?

• The height of the plant (x-axis)

• The height of the plant (y-axis)

• Number of weeks (x-axis)

• Number of weeks (y-axis)

What does H(5) =18 mean in the context of the problem?

• The height of the plant after 5 weeks is 18 inches

• The height of the plant after 18 weeks is 5 inches

• The height of the plant is 5 inches after 18 weeks

• The height of the plant is dependent on the week it was planted

What does f(1990)=214 mean in the context of the problem?

• In 1990 there were 214 million people with health insurance

• In 214, there were 1990 people with health insurance

• When there are 1990 people, the year is 214

• None of these

What is f(1)?

• 1

• 5

• 0

• 4

Given the function f(x) = 3x + 1, evaluate f(a + 2) :

• 7

• 3a + 5

• 3a + 7

• 3a + 2

Is the relation a function? Why?

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

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