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alainabbyboo22

  • 2 years ago

Using the graph, which of these ordered pairs is the best estimate of the solution of the system y = 3x + 2 and y = -1/4 x + 1?

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  1. alainabbyboo22
    • 2 years ago
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    A. (0.5, 0.5) B. (-0.3, 1.1) C. (1.2, 0.8) D. (0.8, -0.5)

  2. alainabbyboo22
    • 2 years ago
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  3. dumbcow
    • 2 years ago
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    set the 2 equations equal and solve for x 3x+2 = -1/4x +1

  4. alainabbyboo22
    • 2 years ago
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    So basically just put the numbers in for x, and whichever equation equals the same for both, is my answer?

  5. alainabbyboo22
    • 2 years ago
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    ???

  6. dumbcow
    • 2 years ago
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    yeah you could do that too :)

  7. alainabbyboo22
    • 2 years ago
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    Okay thanks! :)

  8. alainabbyboo22
    • 2 years ago
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    I tried plugging in all the numbers for x and none of them equal the same.. or am I doing the wrong thing for this problem? I don't get it.

  9. dumbcow
    • 2 years ago
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    Try plugging in x = -0.3 again 3(-.3) +2 = ? -1/4(-.3) +1 = ?

  10. dumbcow
    • 2 years ago
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    there is some rounding error

  11. alainabbyboo22
    • 2 years ago
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    3(-.3)+2 = 1.7 -1/4(-.3)+1 = 0.7

  12. alainabbyboo22
    • 2 years ago
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    So now what?

  13. dumbcow
    • 2 years ago
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    3*(-.3) = -.9

  14. alainabbyboo22
    • 2 years ago
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    Okay but my answer choices available are: A. (0.5, 0.5) B. (-0.3, 1.1) C. (1.2, 0.8) D. (0.8, -0.5)

  15. hoblos
    • 2 years ago
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    you must solve it graphically so you only need to find the point of intersection between the two lines y = 3x + 2 & y = -1/4 x + 1 from the graph then the solution is (-0.3, 1.1)

  16. alainabbyboo22
    • 2 years ago
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    Oh!!!!! Well that would've helped me a long time ago. Lol thank you so much hoblos! :) It means a lot! :)

  17. hoblos
    • 2 years ago
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    my pleasure XD

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