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Write an equation of the line that passes through the pair of points. Leave in simplest fractional form. (9, 2), (-2, 6)

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To find the equation of the line passing through the points
\bf\:(9, 2) and
\bf\:-2, 6), we first need to calculate the slope
\bf\:m using the formula:


\sf\rightarrow\:m = (y_2 - y_1)/(x_2 - x_1)\\

where
\sf\:(x_1, y_1) = (9, 2) and (x_2, y_2) = (-2, 6).


\sf\rightarrow\:m = (6 - 2)/(-2 - 9) = (4)/(-11)\\

Now that we have the slope
\sf\:m = (4)/(-11), we can use the point-slope form of the equation of a line:


\sf\rightarrow\:y - y_1 = m(x - x_1)\\

Substituting
\sf\:(x_1, y_1) = (9, 2) and
\sf\:m = (4)/(-11) into the equation, we get:


\sf\rightarrow\:y - 2 = (4)/(-11)(x - 9)

To simplify this equation, first, distribute
\bf\:(4)/(-11) into
\bf\:(x - 9):


\sf\rightarrow\:y - 2 = (4)/(-11)x + (36)/(11)

Next, bring
\bf\:-2 to the right-hand side by adding
\bf\:2 to both sides of the equation:


\sf\rightarrow\:y = (4)/(-11)x + (36)/(11) + 2\\

Now, simplify the equation further:


\sf\rightarrow\:y = (4)/(-11)x + (36)/(11) + (22)/(11)\\


\sf\rightarrow\:y = (4)/(-11)x + (58)/(11)\\

Therefore, the equation of the line passing through
\bf\:(9, 2) and
\bf\:(-2, 6) in simplest fractional form is:


\textrm\displaystyle\sf y = (4)/(-11)x + (58)/(11)


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answered
User Niamh Doyle
by
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