# Thread: So I kind of forgot how to do this over the summer!

1. ## So I kind of forgot how to do this over the summer!

Ok! I should know how to do this, but:

1. Complete the table and write a rule relating x and y (an eqaution)

X 3 ,-1, 0, 2, -5, -2, 1
Y 0,,,,,,,,,,-1 ,,,,,,,,,,-2

Sorry I do not know how to make tables on here! The blank spaces is where you complete the table. I tried making an equation.

2. Originally Posted by peachgal
Ok! I should know how to do this, but:

1. Complete the table and write a rule relating x and y (an eqaution)

X 3 ,-1, 0, 2, -5, -2, 1
Y 0,,,,,,,,,,-1 ,,,,,,,,,,-2

Sorry I do not know how to make tables on here! The blank spaces is where you complete the table. I tried making an equation.
Can I guess that this is supposed to be a linear function?

My first comment is that you ought to arrange the x's in either ascending or descending order:
x -2, -1, 0, 1, 2, 3
y,,,,,,,,,,,,,,-2, -1, 0

Now the pattern looks a lot clearer:
$\displaystyle d = 0 - 3 = -3$
$\displaystyle d = -1 - 2 = -3$
$\displaystyle d = -2 - 1 = -3$

So each of these has a common value for $\displaystyle d = y - x$, that is $\displaystyle d = -3$.

So let
$\displaystyle y - x = -3$

Then
$\displaystyle y = x - 3$

That looks like it fits what you've got in your table.

-Dan