Matematika

Pertanyaan

persamaan garis L adalah..

a. y = -2× + 8
b. y = 2× - 8
c. y = - 1/2 × + 2
d. y = 1/2 × - 2

tolong di jawab yah..
persamaan garis L adalah.. a. y = -2× + 8 b. y = 2× - 8 c. y = - 1/2 × + 2 d. y = 1/2 × - 2 tolong di jawab yah..

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1 Jawaban

  • Pers. garis G

    y-y1/y2-y1 = x-x1/x2-x1
    y-0/-2-0 = x-4/0-4
    -4y = -2x+8
    2x-4y = 8
    x-2y = 4

    Pers. garis L

    Melalui titik (4,0) dan tegak lurus garis
    G : x-2y = 4
    Maka, pers. garis L :
    bx-ay = bx1-ay1
    -2x-y = -2(4)-1(0)
    -2x-y = -8
    2x+y = 8
    ......y = -2x+8

    ♠ A ♠

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