Re-write the equation to slope-intercept form:
x + y = 8
y = -x + 8 slope = -1/1 y - intercept = 8
To plot:
1. Put a dot on 8 at y axis.
2. From that point, slide your pencil down by one unit, then slide one unit to the right. Stop at that point. Put a dot.
3. Connect the dots. Extend the line passing through the dots (two points), then draw the arrow on both ends.
4. Write the equation x + y - 8 = 0 near the end of the line (kahit aling end ng line)
x - y = -4
-y = -x -4
y = x + 4 slope = 1/1 y-intercept = 4
To plot:
1. Put a dot on 4 at y-axis
2. From that point, slide your pencil up by one unit, the slide one unit to the right. Stop at that point. Put a dot.
3. Connect the dots. Extend the line passing through the dots (two points), then draw arrow on both ends.
4. Write the equation x - y - 4 = 0 near the end of the line.
Make sure that you write y at the top end of y-axis, and x at the right end of x-axis