In the problem below, we figured out that Gadol needs to sell more than 30 cups of lemonade to start earning a profit. We discussed what 'x' represents, what 'y' represents; we found the income and expense equations. Then we graphed them on the same coordinate quadrant.
After looking at the graph, we determined that the region where she is in debt, the region where is she out of deht and the location where here profit zero - the break even point.
Try out the stories about Zephr and Xao.
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