5. Which of the quadratic functions has the narrowest graph? A. y=-2x^2 B. y=(1)/(2) x^2 C. y=(1)/(7) x^2 D. y=-4x^2

Question

5.

Which of the quadratic functions has the narrowest graph?

A.
`y=-2x^2`

B.
`y=(1)/(2) x^2`

C.
`y=(1)/(7) x^2`

D.
`y=-4x^2`

Answer 1

C. y= 1/7x2

Explanation:

The equation with the highest leading coefficient (the number before the x^2 term) will have the narrowest graph. Here, we have to choose between -1, 1/6, 2, and 1/8. The highest number out of all of those numbers is 2, so y = 2x^2 will have the narrowest graph.

Answer 2

D: -4x^2 has the narrowest graph