A quadratic equation is graphed below.

What is the solution set for this equation?

1. { -2 2 9 }
2. {0, 1.8}
3. {- 4 3, 5}
4. {-3.3}

A
Incorrect. This is the y-intercept.

B
Incorrect. Remember that x-intercepts are the same as solutions.

C
Correct! You interpreted the graph correctly.

D
Incorrect. Remember that x-intercepts are the same as solutions.

A quadratic function is graphed below.

Which of the following best represents the roots of the quadratic function shown?

A. -4.5 and 2.5
Correct! You read the graph correctly.

B. -1, 6
Incorrect. Roots are where the graph crosses the x-axis.

C. 5.5
Incorrect. This is the y-intercept.

D. No real roots
Incorrect. Since this graph crosses the x-axis, there will be real roots.

A quadratic equation is graphed below.

Which of the following describes the solutions for this equation?

A. This graph has 2 solutions.
Incorrect. Remember that a solution is the same as an x-intercept.

B. This quadratic function has no solutions.
Incorrect. Look at the x-axis.

C. This quadratic function has two imaginary solutions.
Incorrect. To have an imaginary solution there would be no x-intercepts.

D. This graph has one solution.
Correct! The graph touches the x-axis at only one point.

Which of the following is the solution for the equation 3 − 8w − 5w²= 2w?

A. -2.26, 0.26
Correct! You used the CALCULATE and found the x-intercepts.

B. -2.50, 0
Incorrect. Use the CALCULATE menu to get a more accurate solution.

C. -3
Incorrect. Remember that a solution is the same as an x-intercept.

D. -1, -8
Incorrect. Remember that a solution is the same as x-intercepts.