Algebra STAAR Practice Quadratic

A golfer hit a golf ball from a tee box that is 6 yards above the ground. The graph shows the height in yards of the ball above the ground as a quadratic function of x, the horizontal distance in yards of the golf ball from the tee box.

The graph of quadratic function f is shown on the grid.

What is the y-intercept of the graph of f?

• (m - 15) (m + 2)

• (m - 10) (m - 3)

• (m + 15) (m - 2)

• (m + 10) (m + 3)

The graph of quadratic function k is shown on the grid.
Which statements are best supported by the graph of k?
I. The x-intercept is located at (-3,0). II. The coordinates of the y-intercept are (0,9) III. The axis of symmetry is x = -3

• I and II only

• I and III only

• II and III only

• I, II, and III

Use the quadratic function below to answer the following question: How many x - intercepts does this function have?

• 1

• 2

• 0

• 3

You need to know the vertex to state the​ (a)   which comes from the x value of your vertex.

You also need to know the Vertex to state the ​ (b)   which comes from the ​ y value of your vertex. ​

• Axis of Symmetry

• Range

• a

• y-intercept

• Domain

Mathematical Equivalence

ON

• -1

• -4

• 1

• 0

• 4

The graph of f(x)= x² was transformed to create the graph of g(x) = (x - 7.5)². Which of these describes the transformation?

• A horizontal shift to the right 7.5 units

• A horizontal shift to the left 7.5 units

• A vertical shift down 56.25 units

• A vertical shift up 56.25 units

A projectile is launched into the air from the ground. The table shows the height of the projectile, h(t), at different times. Based on the table, which function can best be used to model this situation?

• h(t)= 99t² + 858

• h(t)= -4.9t² + 295t + 0.6

• h(t)= -4.9t² +295t + 2

• h(t)= 99t² + 1,470.3