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Marianna [84]
3 years ago
11

How does doubling the side length of a rectangle affect its area

Mathematics
1 answer:
baherus [9]3 years ago
7 0
Doubling the side-lengths will multiply the area by four.

Proof:
Let the side-lengths of the rectangle by x and y.  Clearly, the area will be x*y=xy.  The new rectangle will have side-lengths 2x and 2y, and thus area 2x*2y=4xy.  4xy/xy=4 - hence, the new rectangle has four times the area of the old one.
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Answer:

The equation of the line is:

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Step-by-step explanation:

We know that the slope-intercept of line equation is

y = mx+b

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\mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}

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We know that the y-intercept can be computed by setting x=0 and determining the corresponding y-value.

From the graph, it is clear:

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Substituting m = 4 and b = 3 in the slope-intercept form of line equation

y = mx+b

y = 4x + 3

Therefore, the equation of the line is:

y = 4x + 3

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