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Features of Quadratic Graphs

Last updated about 4 years ago

11 questions

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Let’s continue to practice finding intervals of increase, decrease, positive, and negative when analyzing the characteristics of quadratic functions.  Look at the functions below.  Can you answer each characteristic with the correct intervals or ordered pairs?  You may use Desmos to help you.

Question 1

1.

Over what interval is f(x) increasing?

Question 2

2.

Over what interval is f(x) decreasing?

Question 3

3.

What are the x-intercepts of the function f(x)? (WRITE TWO ORDERED PAIRS)

Question 4

4.

When is f(x) positive?

Question 5

5.

Question 6

6.

What is the vertex for the function f(x)?

Question 7

7.

Over what interval is f(x) increasing?

Question 8

8.

Over what interval is f(x) decreasing?

Question 9

9.

Question 10

10.

Question 11

11.

When is f(x) negative?

x < -6

x > -2

-6 < x < -2

When is f(x) positive?

Always

Sometimes

Never

When is f(x) negative?

Always

Sometimes

Never

If you finished the first ten questions, try this

My minimum is y=1 and
all the y-values of my function are positive.

My y-intercept is 5
and my vertex is (-2, 1).

Find my function using the clue below:
f(-1) + f(4) = -11

For my function, f(x) is negative when
x < 0 and x > 2.

The range of my function is y ≤ 1.

My function's y-intercept and vertex are the same.

My function is only increasing over the interval x > -1.

The zeros of my parabola are (-6, 0) and (-2, 0).

My function has a vertex that is (0, 0) and an axis of symmetry of x = 0.

My function is decreasing over the interval (-4, ∞).

I have an axis of symmetry of x = -1.

The x-intercepts of my parabola are opposites.