Describe the change in the graph of the parabola f(x) when it transforms into g(x) = −3f(x).

The parabola g(x) will open in the opposite direction of f(x), and the parabola will be narrower than f(x).
The parabola g(x) will open in the same direction of f(x), and the parabola will be narrower than f(x).
The parabola g(x) will open in the opposite direction of f(x), and the parabola will be wider than f(x).
The parabola g(x) will open in the same direction of f(x), and the parabola will be wider than f(x).

9514 1404 393

  A: opposite direction, narrower

Step-by-step explanation:

The multiplier -3 will cause the parabola to be scaled vertically by a factor of 3, causing it to appear narrower than the original. The fact that this multiplier is negative means the function will be reflected across the x-axis, making it open in the opposite direction.

An example is shown in the attachment.

could you give more information?

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,