Answer to Question #91577 in Trigonometry for Sajid

Question

Q. Choose the correct answer.
Q. The vertex of parabola y=(-1)/2x2-x+4 is
a. (1,9/4)
b.( -1,9/4)
c. (9/2, -1)
d. (9/2, 9/2)

Answer 1

The vertex of parabola y=a x² + b x + c is a point (-b / 2a, (4 * a * c - b * b) / 4a). We can consider a = -0.5, b = -1, c = 4. So vertex of parabola is a point (-1, 4.5). None of proposed answers are correct.