Graphical Solution

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A linear equation in two variables is an equation of the form ax + by + c = 0, where x and y are variables, and a, b, c are constants. The graph of such an equation is always a straight line.

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1. Make x or y the subject of the equation 2. Give at least 3 suitable values to one variable and find corresponding values of the other 3. Construct a table for different pairs of x and y values 4. P

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The equation of the x-axis is y = 0 (all points have y-coordinate as 0) The equation of the y-axis is x = 0 (all points have x-coordinate as 0)

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Theoretically, only 2 points are needed to draw a straight line. However, we plot at least 3 points to verify that our calculations are correct and all points lie on the same straight line, ensuring a

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First, make y the subject: y = -3x + 4 For x = 0: y = 4, point (0, 4) For x = 1: y = 1, point (1, 1) For x = -1: y = 7, point (-1, 7) These three points lie on the line 3x + y - 4 = 0

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The graph of x = a is a straight line parallel to the y-axis, at a distance of 'a' units from the y-axis. All points on this line have the same x-coordinate 'a'.

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The graph of y = b is a straight line parallel to the x-axis, at a distance of 'b' units from the x-axis. All points on this line have the same y-coordinate 'b'.

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1. Draw the graph (straight line) for each equation on the same graph paper 2. Find the coordinates of the point where the two lines intersect 3. The coordinates of the intersection point give the sol