If a litre of water is provided for 20 people, how much for 50 people?
2 answers:
Answer:
2.5 L
Step-by-step explanation:
We use a rule of three to solve this problem, the information we have is represented as follows:
Liters People
1 ⇒ 20
x ⇒ 50
x represents the unknown quantity, the liters that correspond to 50 people.
The way x is found is as follows: We multiply the cross quantities and divide by the remaining quantity.
Thus, for 50 people is provided 2.5 liters of water
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Answer:
B. The graph flips over the x-axis
Step-by-step explanation:
When you plot the coordinate pair (x, y), you plot the point 'y' units above the x-axis. If you change the sign of that (multiply the function by -1), then the point becomes (x, -y), and is plotted 'y' units below the x-axis.
The graph flips over the x-axis.
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Attached is an example of a function with its original graph (red) and the graph after being multiplied by -1 (blue). The blue graph is a reflection of the red graph across the x-axis.
