Question

Help with Algebra please! so appreciated

Answer 1

Can anyone help with that?

Answer 2

I can but I need to know what the definition of a parabola is.

Answer 3

B

Answer 4

A plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the cone or by the locus of points equidistant from a fixed line and a fixed point not on the line.

Answer 5

Does that help Speedy?

Answer 6

no need to use the definition of a parabola here, the sign of x^2 >0 means the parabola is upward. done

Answer 7

Thank you so much. Could you help me with more? If not I understand. I am just really having trouble, and do not get it.

Answer 8

ok, which one?

Answer 9

I do not know why it says im replying when im not

Answer 10

min

Answer 11

because the form of it is a form of upward parabola, to that kind, parabola has minimum value only, it's its vertex.

Answer 12

new question?

Answer 13

Yes

Answer 14

y - axis

Answer 15

How do I find the axis?

Answer 16

your parabola is upward, since its form is y = x^2..... so the symmetric axis MUST BE y-axis

Answer 17

@Brookebrookiee

Do you having a graphing calculator?

Answer 18

No I do not

Answer 19

Okay, if someone tells you the answer you will never understand how to solve this on a test.

Go to this link to use a website graphing calculator:

http://my.hrw.com/math06_07/nsmedia/tools/Graph_Calculator/graphCalc.html

Then next, you type the first function in, check to see if it opens upwards. Do this for all of the functions and you will figure out the right answer.

Answer 20

Okay, thank you! I appreciate your help Leaper

Answer 21

How would I put this in a calculator

Answer 22

Brookebrookiee my response was to your first question at the beginning.

Answer 23

How would I do number 3? I'm sorry I dont understand what to do

Answer 24

@Brookebrookiee

Go to the online graphing calculator, type in that function and then the axis of symmetry is the x value that is at the very bottom of the graph.

Answer 25

Okay, so I would type in x^2+2x-3, on the part of the calculator that says y1?

Answer 26

Yes, then tell me the answer you got and I will tell you if I got the same answer as you.

Answer 27

Okay I got -4?

Answer 28

The axis of symmetry is the x value not the y value.

Answer 29

If it is the x value, what did you get?

Answer 30

ok but on the graph the paraobla goes on two points?

Answer 31

The axis of symmetry is the x value at the very bottom of the parabola

Answer 32

You figured out the y value of the very bottom of the parabola which was -4.

Answer 33

You understand how coordinates work right?

Answer 34

this is what my screen looks like

Answer 35

I know it's very hard to see but if you were to put a ruler to your monitor, the coordinates the bottom of the parabola is (-1, -4)

Answer 36

Do you get it now?

The axis of symmetry is the x value of the bottom of the parabola.

Answer 37

Okay, i think so

Answer 38

x = -1 is the answer.

Answer 39

how do I find the vertex?

Answer 40

Vertex is the very bottom of a parabola.

Do you have a picture of a parabola?

Answer 41

Yes

Answer 42

@Brookebrookiee

Watch this video it will help a lot!

https://www.khanacademy.org/math/trigonometry/polynomial_and_rational/solving_graphing_quadratics/v/quadratic-functions-2

Answer 43

I have to find the vertex of that eqaution now

Answer 44

That video will help you, please watch it. I have to go now.

Answer 45

ok, thanks for the help Leaper