a. For what value of c is the quantity o(xi 2 c)2 minimized?[Hint: Take the derivative with respect to c,set equal to 0, and solve.]b. Using the result of part (a), which of the two quantitieso(xi 2 x)2 and o(xi 2 m)2 will be smaller thanthe other (assuming that x ± m)?

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Rate of Change

The relation between two quantities which displays how much greater one quantity is than another is called ratio.

Slope

The change in the vertical distances is known as the rise and the change in the horizontal distances is known as the run. So, the rise divided by run is nothing but a slope value. It is calculated with simple algebraic equations as: