164k views
2 votes
Given h(x) = |x + 2| − 3 and ????(x) = −|x| + 4:

a. Describe how to obtain the graph of ???? from the graph of a(x) = |x| using transformations.
b. Describe how to obtain the graph of h from the graph of a(x) = |x| using transformations.

1 Answer

2 votes

Answer:

a)

First translating the graph of a along the x axis towards -2, and then along the y axis towards -3

b)

First we have to reflect the graph along the x axis and then translate it along thw y axis towards 4

Explanation:

Hi!

I will consider that ???? stands for g, so we have the fucntions:

h(x) = |x + 2| − 3

g(x) = −|x| + 4

a)

We can see that

h(x) = a(x+2) - 3

this means that we have to do two translations to get from the graph of a(x) to the graph of h(x).

the first one must occur along the x axis, where will the vertex be? we can figure this out looking for the point at which a(x+2) = 0, this point is x=-2, therefore, the first translation will be along the x axis towards -2.

The second translation is along the y axis, and the length of the translation is given evaluating h(x) at the point where a(x+2) vanishes, that is x=-2

h(-2) = -3

Therefore, the second translation will be along the y axis towards -3.

At the end, we will have the same a(x) graph but with its vertex at (-2,-3)

b)

here we can see that:

g(x) = -a(x) + 4

The minus sign multiplying a(x), indicates us that the graph must be reflected along the x axis, that is, insted of ''opening'' upwards, it will ''open'' downwards, the second tranformation is a translation along the y axis, and similar to the previous case, the point will be given when a(x)=0, that is:

g(0) = 4

therefore, the graph must be translated along the y axis towards y = 4

User Shubham Sharma
by
7.8k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories