# Math

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1) Write the correct function rule that describes the relationship shown in the table below.

X f(x)
1 -1
2
3
4
5

• Math -

No functional "relationship" is shown, except at x=1. You need to complete the table.

• Oops -

The table is

X f(x)
1 -1
2 2
3 5
4 8
5 11

• Math -

trick:
X f(x) then column of change in f(x)
1 -1
#### 3
2 2
#### 3
3 5 a ha, change in y constant for 1 unit change in x so --- constant slope = 3/1 and form y = 3 x + b
#### 3
4 8
#### 3
5 11
So put in a x and f(x)
like (1,-1)
-1 = 3 (1) + b
b = -4
so
y = 3 x - 4

• Math -

thanks so much

• Math -

You are welcome :)

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