The graph below depicts the price of tomatoes as a function of quantity, with each line representing the prices at different shops.
Where is it cheaper to buy 7 kg of tomatoes?
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The graph below depicts the price of tomatoes as a function of quantity, with each line representing the prices at different shops.
Where is it cheaper to buy 7 kg of tomatoes?
Let's look at the red line:
The X-axis shows us the quantity, we'll locate 7 kg and from it draw a vertical line to the line - mark a point.
From this point we'll draw a horizontal line to the Y-axis which shows the price and we'll see that 7 kg costs 8 NIS.
Let's look at the blue line:
The X-axis shows us the quantity, we'll locate 7 kg and from it draw a vertical line to the line - mark a point.
From this point we'll draw a horizontal line to the Y-axis which shows the price and we'll see that 7 kg costs 10 NIS.
Therefore it's better to buy at the red store, it's cheaper.
In the red shop
Look at the function shown in the figure.
When is the function positive?
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