Write a rule for the linear function in the table.

x

f (x)

1

_7

2

_10

3

_13

4

_16

Write a rule for the linear function in the table.

x

f (x)

1

3

2

2

3

1

4

0

1)

table

x f (x)

1 - 7

2 - 10

3 - 13

4 - 16

slope: rise / run = [-10 - (-3) ]/1 = - 3

y-intercept: x=0=> y = - 4 = b

equation: y = - 3x - 4 ... this is the rule

2) table

x f (x)

1 3

2 2

3 1

4 0

slope: rise / run = [2 - 1] / [2 - 3] = - 1

y-intercep: x = 0 = > y = 4 = b

equation: y = - x + 4 ... this is the rule