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16 November, 19:54

Write the equation of the line, in standard form, that has a y-intercept of 2 and is parallel to 2x+y=-5, include your work in your final answer.

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  1. 16 November, 20:13
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    The general equation of the line is y = mx+c

    Where m is the slope and c is a constant

    the given line ⇒ 2x+y = - 5 ⇒⇒ y = - 2x - 5

    The slope of the given line = - 2

    The required line is parallel to the given line

    so the slope of the required line = - 2 ⇒ ∴ y = - 2x + c → (1)

    the required line has y-intercept of 2

    So, the line is passing through (0, 2)

    substitute in (1) to find c

    ∴ 2 = - 2 * 0 + c ⇒ c = 2

    ∴ y = - 2x + 2

    The equation of the line, in standard form ⇒⇒ 2x + y = 2
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