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16 July, 16:54

Select all of the ordered pairs that make the

inequality y> x2 + 3x - 4 true.

(0,0)

(2,1)

(-2,-1)

(-5, - 1)

+1
Answers (1)
  1. 16 July, 17:03
    0
    y > x² + 3x - 4

    We can just simply test all of the values. The value of the y-coordinate has to be greater than the expression on the left after plugging in x.

    A. (0, 0) YES

    y > x² + 3x - 40 > 0 + 0 - 40 > - 4 TRUE

    B. (2, 1) NO

    y > x² + 3x - 41 > (2) ² + 3 (2) - 41 > 4 + 6 - 41 > 6NOT TRUE

    C. (-2, - 1) YES

    y > x² + 3x - 4-1 > (-2) ² + 3 (-2) - 4-1 > 4 - 6 - 4-1 > - 6TRUE

    D. (-5, - 1) NO

    y > x² + 3x - 4-1 > (-5) ² + 3 (-5) - 4-1 > 25 - 15 - 4-1 > 6NOT TRUE
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