Which statement describes the function y=ax^n when a=1 and n is odd?
A. The graph opens down.
B. The graph is symmetric about the origin
C.The graph does not pass through the origin
D. The graph has more than one x intercept

Respuesta :

ANSWER

B. The graph is symmetric about the origin

EXPLANATION.

The given function is

[tex]y = a {x}^{n} [/tex]

When a=1,

[tex]y = {x}^{n} [/tex]

Let,

[tex]f(x)= {x}^{n} [/tex]

[tex]f(-x)= {( - x)}^{n} [/tex]

Since n is odd,

[tex]f(-x)=-{( x)}^{n} [/tex]

[tex] \Rightarrow f(-x)=-f(x)[/tex]

This implies that, the function

[tex]y={x}^{n}[/tex]

is symmetric with respect to origin.

The correct answer is B

Answer:

B. The graph is symmetric about the origin

Step-by-step explanation:

We have the function [tex]y=a x^{n}[/tex], where a= 1 and n= odd.

'Leading Coefficient Test' states that 'when 'n' is odd and the leading coefficient is positive, then the graph falls to the left and rises to the right'.

As we have, [tex]y=x^{n}[/tex], where n is odd and leading coefficient a=1.

So, the graph of this function will fall to the left and rise to the right.

Then, option A is not correct.

Moreover, x= 0 ⇒ [tex]y=0^{n}[/tex] ⇒ y= 0.

So, this function passes though (0,0) i.e. origin.

Then, option C is not correct.

Also, 'x-intercept is the point when graph cuts the x-axis i.e. when y= 0'.

So, we have,

[tex]0=x^{n}[/tex] ⇒ x= 0.

Thus, the only x-intercept is the point (0,0).

Then, option D is not correct.

From the graph below, we see that, the graph of [tex]y=x^{n}[/tex] is symmetric about origin.

Hence, option B is correct.

Ver imagen wagonbelleville