STAAR Success Lesson 3 (Quadratic practice questions)

STAAR Success Lesson 3

Using the Desmos Calculator

Be sure to use the STAAR testing version of the Desmos calculator from now on. Open this link now:

https://www.desmos.com/testing/texas/graphing

1. Factoring

2. Graphing

3. Quadratic formula

4. Square Roots

​Solving Quadratics:

1. U-shaped curve

2. ​The Axis of symmetry is the vertical line that cuts the parabola in half

A parabola is a...

Quadratic Functions

Multiple Choice

Which statement about the function $$n\left(x\right)=5x^2-20x+12$$ is true?

• The domain of the function is $$x\ge2$$

• The range of the function is $$n\left(x\right)\ge-8$$

• The domain of the function is $$x\ge0$$

• The range of the function is $$n\left(x\right)\le12$$

Multiple Choice

What is the range of g?

• All real numbers less than or equal to $$\frac{3}{2}$$

• All real numbers greater than or equal to $$\frac{3}{2}$$

• All real numbers less than or equal to $$\frac{19}{4}$$

• All real numbers greater than or equal to $$\frac{19}{4}$$

Multiple Choice

Which graph best represents part of a quadratic function with a domain of all real numbers less than -4?

Multiple Choice

Which statement appears to be true?

• The function has 3 zeros.

• The maximum value of the function is 3.

• The vertex of the function is (4, 1).

• The axis of the symmetry of the graph is x=1.

Multiple Select

Which values best represent the zeros of the function? Select two correct answers.

• x=1

• x=-3

• x=-1

• x=3

• x=0

Multiple Choice

The solutions to $$k\left(x\right)=0$$ are $$x=7$$ and $$x=-7$$ . Which quadratic Function could represent k?

• $$k\left(x\right)=x^2-14$$

• $$k\left(x\right)=x^2+14$$

• $$k\left(x\right)=x^2+49$$

• $$k\left(x\right)=x^2-49$$

Multiple Choice

Which graph best represents $$f\left(x\right)=\left(x+1\right)\left(x-3\right)$$

Great job!

Continue reviewing for your STAAR exam on April 25th!