Question

The graph of a quadratic function is given below. What is the domain and range? *​

Answer 1

D

Explanation:

There are no excluded values of x in the domain of the function.

Thus domain is - ∞ < x < ∞

The range covers the permissible values of y

These are from (- 1, 16 ) downwards to - ∞

Thus range is y ≤ 16

Answer 2

The calculated domain of the graph is -∝ < x < ∝ and the range is y ≤ 16

Calculating the domain and range of the graph

From the question, we have the following parameters that can be used in our computation:

The graph

The above graph can be represented as a list of ordered pairs

The rule of a graph is that

• The domain is the x values
• The range is the f(x) values

Using the above as a guide, we have the following:

x values = All real values

y values = negative infinity to 16

Hence, the domain is -∝ < x < ∝ and the range is y ≤ 16