$\"\"$

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(a)

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The points are $\"\"$ and $\"\"$ .

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Distance between the two points formula: $\"\"$

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Substitute the $\"\"$ and $\"\"$ in the distance formula.

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$\"\"$

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Distance between the two points is $\"\"$ units.

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$\"\"$

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(b)

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Find line equation joining the points $\"\"$ and $\"\"$ .

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Line passing through the origin is $\"\"$ .

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Slope of the points $\"\"$ and $\"\"$ is $\"\"$ .

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$\"\"$ .

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Find the arc length of the curve $\"\"$ :

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Definition of the arc length:

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If the curve $\"\"$ , $\"\"$ , then the length of the curve is defined as,

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$\"\"$ .

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Consider $\"\"$ .

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$\"\"$ .

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Substitute $\"\"$ and $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$ .

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Arc length of the graph in the indicated interval is $\"\"$ units.

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Distance between the points is $\"\"$ units.

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$\"\"$

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(a) and (b) Distance between the points is $\"\"$ units.