Step 1: Put x = 0 into the equation which becomes -4y = 20 so that y = -5.
So mark (0, -5) as one point on the graph.
Step 2: Put y = 0 into the equation which becomes 8x = 20 so that x = 2.5
So mark (2.5, 0) as another point on the graph.
Step 3: Join the two point and extend the line in both directions.
Step 4: Hand in your work!
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No translation will invert a quadratic graph.
20 = 400
2
Graph and Table: http://i50.tinypic.com/szhr4k.png
4 times 4 does not equal 20, it equals 16. 5 times 6 equals 30.