Question

How do you graph 2x-y=4 using a table of values?

Answer 1

Rearrange equation, sub in values of `x`, calc values of `y`, make a results table, plot points.

Explanation:

1. rearrange the equation to give a more familiar form (like `y = mx+c`)
   move `2x` over gives,
   `-y = -2x + 4`
   multiply by `-1` gives,
   `y = 2x - 4`
2. sub in values of `x`, calc values of `y`
   when `x = 0, y = -4`
   when `x = 1, y = -2`
   when `x = 2, y = 0`
   when `x = 3, y = +2`
3. make a results table
   already done, see above
4. plot these points (in red) on a standard x-y axes (in black) . gives a straight line (in blue).