How to find the area of the rectangular region $2 ≤ x ≤ 5$, $-1 ≤ y ≤ 3$.
I tried to plot the graph in $xy$-plane, but I'm not sure how to find the area.
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The area of a rectangle is $b\cdot h$. Is not the basis equal to $3?$ – mfl Feb 17 '19 at 18:38
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1Do you know how to calculate the area of any rectangle? – JoseSquare Feb 17 '19 at 18:38
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Area of a rectangle is given by base$\times$height. The base of this rectangle is the change in $x=|5-2|=3$ and the height of the rectangle is the change in $y=|3-(-1)|=4$. The area is then $$3\times4=12$$
Peter Foreman
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The area of a rectangle of length $L \times l$ is $L\cdot l$.
One of the lengh $L_x$ is equal to the interval of variation of x: $L_x = 5-2 = 3$.
Same goes for $L_y = 3 - (-1) = 3 + 1 = 4$
The area is $3\cdot 4 = 12$.
PackSciences
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