Write an equation of the line that passes through the points (1, 2) and (4, 8)

Question

Write an equation of the line that passes through the points (1, 2) and (4, 8)

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Ben Gia 5 years 2021-08-24T13:18:35+00:00 2 Answers 14 views 0

Answers ( )

  1. minhkhoi
    0
    2021-08-24T13:19:35+00:00
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    Answer:

    y = 2x

    Step-by-step explanation:

    The equation of a line in slope- intercept form is

    y = mx + c ( m is the slope and c the y- intercept )

    Calculate m using the slope formula

    m = \frac{y_{2}-y_{1} }{x_{2}-x_{1} }

    with (x₁, y₁ ) = (1, 2) and (x₂, y₂ ) = (4, 8)

    m = \frac{8-2}{4-1} = \frac{6}{3} = 2 , then

    y = 2x + c ← is the partial equation

    To find c substitute either of the 2 points into the partial equation

    Using (1, 2 )

    2 = 2 + c ⇒ c = 2 – 2 = 0

    y = 2x ← equation of line

  2. Dau
    0
    2021-08-24T13:19:41+00:00
    Reply

    Answer:

    2x-y=0 / y=2x

    Step-by-step explanation:

    6x-3y=0, 2x-y=0

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )