# Learner

• May 9th 2010, 02:54 PM
MrDavidOrley2010
Learner
Three lessons on algebra - so don't laugh please!

I am working on a gcse practice sheet - but I am unable to understand: y = 3x - 2

The given values are :
x -1 0 1 2 3
y ? -2 1 ? 7

Unsure if I've put this problem across clear enough, but I then have to draw this equation y = 3x - 2 on a grid.

• May 9th 2010, 04:04 PM
bjhopper
learner
Quote:

Originally Posted by MrDavidOrley2010
Three lessons on algebra - so don't laugh please!

I am working on a gcse practice sheet - but I am unable to understand: y = 3x - 2

The given values are :
x -1 0 1 2 3
y ? -2 1 ? 7

Unsure if I've put this problem across clear enough, but I then have to draw this equation y = 3x - 2 on a grid.

Hi David,

For each given value of x you need to calculate the value of y by substituting in the given equation. Each point consisting of x and y is then plotted on graph paper. All the points connected form a straight line which is defined by the equation y=3x-2

bjh
• May 9th 2010, 04:15 PM
YellowFlash
Substituting the values 1 and 2 as X in your equation, Y=3x-2 will give you the corresponding Y values