(3, y) and (9, -9); slope: -4/3 Find y PLEASE HELP

Question

(3, y) and (9, -9); slope: -4/3
Find y
PLEASE HELP

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Samantha 1 week 2021-11-18T05:52:02+00:00 1 Answer 0 views 0

Answers ( )

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    2021-11-18T05:53:17+00:00

    For this case we have that by definition, the pendeinte of a line is given by:

    m = \frac {y_ {2} -y_ {1}} {x_ {2} -x_ {1}}\\(x_ {1}, y_ {1}) :( 3, y)\\(x_ {2}, y_ {2}) :( 9, -9)

    Substituting according to the data we have:

    - \frac {4} {3} = \frac {-9-y} {9-3}\\- \frac {4} {3} = \frac {-9-y} {6}\\6 * - \frac {4} {3} = - 9-y\\-8 = -9-y\\y = -9 + 8\\y = -1

    Answer:

    y = -1

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