On your Own 1:

As a set of points: (-3, 2), (-2, -2), (-1, 1), (1, 0), (2, -1), (3, 2)

As a table:
 x  -3 -2 -1 1 2 3
y 2 -2 1 0 -1 2

D = {-3, -2, -1, 1, 2, 3}

R = {-2, -1, 0, 1, 2}

 

On your Own 2:

The relations in examples 1 - 3 are all functions

 

On your Own 3:

1. Yes, even though the x-value of 3 is used twice it is paired with a y-value of 7 both times. Therefore, it is still a function.

 

2. No, the x-value of -11 is paired with two different numbers (-10 and -9) so it is not a function .

 

3. Yes, again the x-value of 3 shows up twice, but 2 + 2 just another way of writing 4. So, the x-value has really only been paired with one y-value, 4, so it is a function.

 

On your Own 4:

1. y = 2x + 8

2. y = -3x + 30

3. y = 5x + 5


Return to Day 1

Return to Chapter 5 Lesson

Back to BJ's Page