Question

HELP! (37PTS)

the graph of the of the quadratic function f is shown on the grid.Which of these best represents the domain of f ?
a. -3 ≤ х ≤ 2
b. all real numbers
c. y ≥ 5.5
d. All real numbers less than -3 or grater than 2

Domain:set of all possible x values,independent variable.
Range:Set of all possible y values, dependent variable.

Marissa reviews the graph and remembers
to look at how far the graph goes from the right to the left.She choses A for the correct domain

Error:

Solution:

Answer 1

The error is C and the solution is B

Explanation:

C is because she didn't look left to right to see that is goes on forever

B because you look left and right to see

Answer 2

b. all real numbers

Explanation:

The graphs of positive and negative x^2 parabolas will always have a domain of all real numbers. Even though you only have a portion of the graph and see a "restriction" on your domain values, it is incorrect to assume that the domain is limited to what you can see. As the branches of the parabola keep going up and up and up, the values of x keep getting bigger and bigger and bigger. Again, this is true for all + or - parabolas.