Understanding Quadratic Functions and Their Graphs

What happens to the direction of a parabola when the coefficient of x² is negative?

• The parabola becomes a straight line.

• The parabola opens upwards.

• The parabola opens downwards.

• The parabola does not change direction.

How do you calculate the x-coordinate of the vertex in a quadratic function?

• By using the formula A/2B.

• By using the formula -A/2B.

• By using the formula B/2A.

• By using the formula -B/2A.

What is the value of the x-coordinate of the vertex in the given problem?

• 3

• 2

• 1

• 4

After finding the x-coordinate, how do you determine the y-coordinate of the vertex?

• By substituting the x-value into the original equation.

• By adding the x-value to the original equation.

• By subtracting the x-value from the original equation.

• By dividing the x-value by the original equation.

What is the maximum value of the quadratic function in the problem?

• -8

• -10

• -12

• -14