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saucvi

  • one year ago

Choose the equation below that represents the line passing through the point (2, -4) with a slope of one half.

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  1. saucvi
    • one year ago
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    A. y=1/2x+5 B. y=1/2x-3 C. y=1/2x-5 D. =1/2x+3

  2. Vocaloid
    • one year ago
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    point-slope form: y - y1 = m(x-x1) plug in slope (1/2) for m, 2 for x1, and -4 for y1, then re-arrange and solve

  3. saucvi
    • one year ago
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    How do I plug in slope? I understand none of this ): @Vocaloid

  4. Vocaloid
    • one year ago
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    replace m with 1/2 replace x1 with 2 replace y1 iwth -4

  5. saucvi
    • one year ago
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    @Vocaloid Is it y=1/2x-3

  6. Vocaloid
    • one year ago
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    no, can you show me how you arrived at that answer?

  7. saucvi
    • one year ago
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    I plugged in the numbers and got y-(-4) = 1/2(x-2). Explaining it now I realize I don't even know how I got my answer. I think I rearranged wrong and miscalculated somewhere

  8. saucvi
    • one year ago
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    @vocaloid

  9. Vocaloid
    • one year ago
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    yes, your plugging in is right but you may have made a mistake in the rearranging y-(-4) = 1/2(x-2) y+ 4 = 1/2(x) - 1 y = (1/2)x - 5

  10. saucvi
    • one year ago
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    Why did -4 become positive and where did the -1 come from? @vocaloid

  11. Vocaloid
    • one year ago
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    4 becomes positive because y-(-4) = y + 4 (remember that two negative signs together become positive) 1/2(x-2) = 1/2(x) - 1 because you distribute the 1/2 1/2(x-2) = (1/2)(x) - (1/2)(2) = (1/2)x - 1

  12. saucvi
    • one year ago
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    Ohh okay. Thank you so much!

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