x

-1

0

1

2

3

4

y

-1

2

5

8

11

14

1 slope:   y-intercept:

x

-2

-1

0

1

2

3

y

17

11

5

-1

-7

-13

2 slope:   y-intercept:

x

-3

-2

-1

0

1

2

y

0

$$\displaystyle {2}\over\displaystyle{3}$$

1$$\displaystyle {1}\over\displaystyle{3}$$

2

2$$\displaystyle {2}\over\displaystyle{3}$$

3$$\displaystyle {1}\over\displaystyle{3}$$

3 slope:   y-intercept:

x

-1

0

1

2

3

4

y

-7

-3

1

5

9

13

4 slope:   y-intercept:

x

-5

-4

-3

-2

-1

0

y

1

2.5

4

5.5

7

8.5

5 slope:   y-intercept:

x

-4

-3

- 2

-1

0

1

y

0

0.6

1.2

1.8

2.4

3

6 slope:   y-intercept:

The table above lends itself to previewing that we can find the slope from any 2 points. Ask: How are the first and last points connected to 3 /5?

x

1

2

3

4

5

6

y

5

3

1

-1

-3

-5

7 slope:   y-intercept:

x

-4

-2

0

2

4

6

y

0

4

8

12

16

20

slope:   y-intercept:

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