How do you solve 2x-4y 4 and 3x-y 4 using a graph?

Answer 1

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Plot the graph of 2x -4y = 4 (I am assuming that there is a "=" sign there). To do this, cover up "-4y". This leave 2x = 4 and, on dividing by 2, x = 2. Thus x=2, y=0 or (2, 0) is one point on the graph. Next cover up "2x", which leaves -4y = 4 so that y = -1 and so (0, -1) is another point on the graph. Mark these two points on a coordinate plane, join them together with a straight line and extend the line in both directions.

Repeat for the second equation. The two lines will intersect and th coordinates of their point of intersection is the solution.

Further Information:

If you mean: 2x-4y = 4 and 3x-y = 4

Coordinates of 1st line: (2, 0) and (0, -1)

Coordinates of 2nd line: (4/3x, 0) and (0, -4)

Graph the two lines on the Cartesian plane and where they intersect are the solutions to the equations which works out as x = 1.2 and y = -0.4