8. If lim f(x) = 9 which of the following must be true? X-4 1. f is continuous at x = 4. II. f(4) = 9. III. f(x) is defined at x = 4. A. Ionly B. Iand II only C. Il and III only D. None of these

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A:

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A: Please refer the attached image for complete solution.

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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: