Answer:
<em><u>7</u></em><em><u>/</u></em><em><u> </u></em><em><u>Ans;</u></em>

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<em><u>9</u></em><em><u>/</u></em><em><u>Ans;</u></em>

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In the two questions, we first replace the division with multiplication with flipping the fraction after the division sign, secondly we analyze any equation that needs analysis to simplify it, thirdly, to simplify the fraction by deleting the numerator and the similar denominator .
For this case we have that by definition, the slope of a line is given by:

Where:
and
are two points through which the line passes
According to the statement we have:

Substituting we have:

Thus, the slope of the line is:

Answer:

14= 4 pi/6 pi = 2/3
15 = 8 pi/10 pi = 4/5
16 = no