# Math Help - coming up with a single expression

1. ## coming up with a single expression

Hello, ok, so i have 2 columns like this:

x and y
1 100
2 75
3 50
4 25

Can someone come up with a single mathematical expression that relates x and y like y=...... ?

2. ## Yes

Originally Posted by Octavarium
Hello, ok, so i have 2 columns like this:

x and y
1 100
2 75
3 50
4 25

Can someone come up with a single mathematical expression that relates x and y like y=...... ?
$y=125-x$

3. ^ that doesn't work out...i actually wenthere Equation Generator punched in my numbers and it turns out to be y= -25x +125

4. ## O silly me

Originally Posted by Octavarium
^ that doesn't work out...i actually wenthere Equation Generator punched in my numbers and it turns out to be y= -25x +125
I meant to write $y=125-25x$

5. Ah...thanks !