A community for students.
Here's the question you clicked on:
 0 viewing
alainabbyboo22
 3 years ago
Which equation has this graph?
alainabbyboo22
 3 years ago
Which equation has this graph?

This Question is Closed

alainabbyboo22
 3 years ago
Best ResponseYou've already chosen the best response.0Answer choices available: A. y = x2  6x + 5 B. y = x2  6x + 5 C. y = x2  6x  5 D. y = x2 + 6x  5

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3You said you tried plugging in some points from the graph in these equations? What points did you choose?

alainabbyboo22
 3 years ago
Best ResponseYou've already chosen the best response.0Oh that was for a different equation. This one is a new one.

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3Ah, well same method should work. There are two points that are very easy to spot here: the "zeros" of the graph: (1,0) and (5,0) do you see that?

alainabbyboo22
 3 years ago
Best ResponseYou've already chosen the best response.0Not exactly.. :/ I don't get this one.

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3So can you tell me any point on that graph? A point is an x and y coordinate.

alainabbyboo22
 3 years ago
Best ResponseYou've already chosen the best response.01 and 3? I don't know. :(

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3A point looks like this: (x, y). These numbers correspond to points on graphs. Do you see how (1,0) lies on that graph? Do you see how (0,0) does not?

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3dw:1327095609111:dw like that^

alainabbyboo22
 3 years ago
Best ResponseYou've already chosen the best response.0Alright, then what's next?

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3The graph "passes through" (1,0) but not (0,0)

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3So we know (1,0) is a point on this graph. So let's try and plug x = 1 and y = 0 into those 4 choices and see which one works.

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3A. y = x2  6x + 5 B. y = x2  6x + 5 C. y = x2  6x  5 D. y = x2 + 6x  5 Can you plug x = 1 and y = 0 into any of these?

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3I'll do the first one for you: y = x^2  6x + 5 if x = 1, and y = 0 we get: 0 = (1)^2  6(1) + 5 0 = 1  6 + 5 0 = 5 + 5 0 = 0 So this is true for equation A. Equation A is a possible answer.

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3Are you stuck/confused?

alainabbyboo22
 3 years ago
Best ResponseYou've already chosen the best response.0Hold on I'm trying to figure them out.

alainabbyboo22
 3 years ago
Best ResponseYou've already chosen the best response.0For the B, I solved the equation and got the answer 6. Where do I go from there for B?

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3You should have gotten an equation for equation B: something like: ? = ?

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3not just a single number, but an equation.

alainabbyboo22
 3 years ago
Best ResponseYou've already chosen the best response.0Well I'm saying where do I go after I solve for that? To get to ?=?

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3So let's take a look at B: y =  x^2  6x + 5 if x = 1, y = 0, plug them in the equation: 0 =  (1^2)  6(1) + 5 0 = 1  6 + 5 0 = 2 but this is not true! 0 does not equal 2, do you agree?

alainabbyboo22
 3 years ago
Best ResponseYou've already chosen the best response.0I agree! So basically, once I have plugged in everything, I get rid of the x's and just put those together and I will find out what 0 equals?

alainabbyboo22
 3 years ago
Best ResponseYou've already chosen the best response.0A will be my answer because that is the only one that equals 0!

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3You want to find the equation where the points (x=1,y=0) and also (x=5,y=0) satisfy the equation.

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3I think A is right as well!

alainabbyboo22
 3 years ago
Best ResponseYou've already chosen the best response.0Thank you heisenberg! :)

heisenberg
 3 years ago
Best ResponseYou've already chosen the best response.3Np :). Hope you understood it a little bit. Basically, this was our process: 1. Find a point that lies on the graph 2. Check each equation to see if this point's x and y result in a *true* equation. Good luck :)
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.