A community for students.
Here's the question you clicked on:
 0 viewing
 2 years ago
PLEASE HELP
Your friend, Patricia, is having a hard time understanding the concept behind the domain and range of a parabola. Using complete sentences, explain the meaning of the domain and range of the graph of
y = −x2 + 4x − 21 and how to find both. Keep in mind, your goal is to help Patricia understand the "concepts", not just how to use the steps.
 2 years ago
PLEASE HELP Your friend, Patricia, is having a hard time understanding the concept behind the domain and range of a parabola. Using complete sentences, explain the meaning of the domain and range of the graph of y = −x2 + 4x − 21 and how to find both. Keep in mind, your goal is to help Patricia understand the "concepts", not just how to use the steps.

This Question is Closed

mark_o.
 2 years ago
Best ResponseYou've already chosen the best response.1@ Solmyr do you know if the parabola is opening upward or downward?

mark_o.
 2 years ago
Best ResponseYou've already chosen the best response.1if y =  x2 then its downward if y= + x2... then its upward note theres also parabola that opens sideways on the left or at the right

mark_o.
 2 years ago
Best ResponseYou've already chosen the best response.1therefore this type of parabola y = −x2 + 4x − 21 is opens upward or downward ?

mark_o.
 2 years ago
Best ResponseYou've already chosen the best response.1it is essential to know if the parabola is opening upward or downward or sideways.. :D

mark_o.
 2 years ago
Best ResponseYou've already chosen the best response.1Assuming your parabola is y = ax^2 + bx + c: The domain is always all real numbers... To find range, find the vertex. If it opens upward, the range will be [ycoord. of vertex, infinity) Positive 'a' opens up If it opens downward, the range will be (infinity, ycoord. of vertex] Negative 'a' opens downward
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.