How do I find y+3x=-1 when using a table to graph a line

Question

Using a table of x and y,how would I find y+3x=-1

Answer 1

First solve the equation into a y= format.  This is accomplished by subtracting 3x from both sides.

 

y + 3x = -1

y = -1 - 3x

 

Then pick a set of x-values for your table.  I always use -2, -1, 0, 1, and 2.  

 

With the new form of the equation, you have a formula to convert x into y.

 

For example,

When x = -2, y = -1 -3(-2) = -1 +6 = 5.  Therefore, -2, 5 would be a row on your table.

When x = -1, y = -1 -3(-1) = -1 + 3 = 2.  Therefore, -1, 2 would be a row on your table.

 

Good luck finishing the problem