Ask Question
24 June, 23:30

Use a graphing calculator to sketch the graph of the quadratic equation, and then state the domain and range. y=x^2+x+9 a. D: all real numbers R: (y ≤ 8.75) b. D: (x ≥ 0) R: (y ≥ 0) c. D: all real numbers R: (y ≥ 8.75) d. D: all real numbers R: (y ≥ - 8.75)

+2
Answers (1)
  1. 24 June, 23:42
    0
    Answer: Option c. D: all real numbers R: (y ≥ 8.75)

    Solution:

    y=x^2+x+9

    Domain: all real numbers = ( - Infinite, Infinite)

    y=ax^2+bx+c

    a=1 > 0, the parabola opens upward: Range: y ≥k

    b=1

    c=9

    Vertex: V = (h, k)

    h=-b / (2a)

    h=-1 / (2 (1))

    h=-1/2

    h=-0.5

    k=y=h^2+h+9

    k = (-0.5) ^2 + (-0.5) + 9

    k=0.25-0.5+9

    k=8.75

    Range: y≥k

    Range: y≥8.75
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Use a graphing calculator to sketch the graph of the quadratic equation, and then state the domain and range. y=x^2+x+9 a. D: all real ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers