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what is the function rule? X=-2,-1,0,1,2 y=9,4,-1,-6,-11

Guest Mar 6, 2015

Best Answer 

 #1
avatar+93691 
+5

$$\begin {tabular} {|c|c|c|c|c|c|}\hline
$x$&-2&-1&0&1&2\\\hline
$f(x)$&9&4&-1&-6&-11\\\hline
\end {tabular}$$

 

f(x)=-5x-1

 

I'll try and give you an insight into some of my logic.

When the top is positive, the bottom is negative so there is a  mult by  a neg number in there.

Then I just looked at the numbers and  "times by -5" came to me as a distinct possibility,

the nubers would have been    10,5,0,-5,-10

so I had to subtract 1

Melody  Mar 7, 2015
 #1
avatar+93691 
+5
Best Answer

$$\begin {tabular} {|c|c|c|c|c|c|}\hline
$x$&-2&-1&0&1&2\\\hline
$f(x)$&9&4&-1&-6&-11\\\hline
\end {tabular}$$

 

f(x)=-5x-1

 

I'll try and give you an insight into some of my logic.

When the top is positive, the bottom is negative so there is a  mult by  a neg number in there.

Then I just looked at the numbers and  "times by -5" came to me as a distinct possibility,

the nubers would have been    10,5,0,-5,-10

so I had to subtract 1

Melody  Mar 7, 2015

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