# Algebra 1

How can I determine a equation from a graph? How can I determine how to graph y = x^2 + x - 2? Or y = x^2 - 4x + 4? Am I supposed to use the slope method (rise and run)?

1. 👍 0
2. 👎 0
3. 👁 134
1. I bet you have the zeroes from the graph. Look to see when the graph crosses the x axis, say at a and b.
then (x-a)(x=b)=0 mulitpy it out and you have it.

graphing y=x^2 -x-2=(x-2)(x+1)
it is zero (crosses x axis) at x=2, and x=-1. The max will be half way between those, or at x=.5
What is the max? Put in x=.5, calculate y. Graph those points

1. 👍 0
2. 👎 0
2. I tried the same method that you did to graph the equation y =x^2 -4x + 4 and my x-intercepts are both -2 (the y-intercept is y= 4). However, according to wolfram, the x-intercept should be 2. Who is correct: me or the website?

1. 👍 0
2. 👎 0
3. You did not factor correctly.
x^2-4x+4 = (x-2)(x-2)

If that's what you got, then you clearly don't understand what it means.

x-2 = 0 when x=2, not -2.

1. 👍 0
2. 👎 0
posted by Steve

## Similar Questions

1. ### algebra

what would a graph look like if.. y= (3/4)x + 2 and the domain is... x = {-8,-4,0,4,8} would it be discrete or continous? Kelly you should be able to see that the first equation is a line. You should be able to determine the slope

asked by Kelly on August 27, 2006
2. ### Algebra

Could you please check my work. Determine whether the realtion is a funtion. 2.{(-6,2),(-2,5),(3,2),(3,-7)} -Not a function 2. Determine whether the equation defines y as a function of x. 2x+4y=15- the answer I got is y is a

asked by Soly on August 30, 2007
3. ### Pre-Calculus

For the function f(x)=12x^3+4x^2-27x-9 describe the end behavior. Find the real zeros of f and determine whether the graph crosses or touches the x-axis at each x-intercept. Use the zeros of f and test numbers to find the

asked by Leizy on October 10, 2015
4. ### Chemistry

1) Determine the Kc for the following experimental conditions: compound A+compound B --> Compund D Compound: A B M 0.003 0.0023 Volume used: 5 mL 8 mL Total volume = 25 mL, using graph 2 and a %T of 24 for compund D molecular

asked by Anonymous on March 4, 2013
5. ### math

What are the equation on these 1. Determine the amplitude of y = -16 cos (x) 2. Determine the amplitude of = -sin (x) 3. Determine the domain of = -5 cos (x) 4. Determine the range of y = -10 sin (x) 5. Determine the period of y =

asked by Bernice on December 17, 2009
1. ### Algebra

Suppose that f(x)= (5x) _________ (x^2)−x−6 a. Determine the domain of f b. Determine the vertical asymptote(s), if any, of the graph of f c. Determine the horizontal asymptote(s), if any, of the graph of f d, Sketch the graph

asked by Sammi on July 27, 2014
2. ### Calculus AB

Let f be the function that is given by f(x)=(ax+b)/(x^2 - c). It has the following properties: 1) The graph of f is symmetrical with respect to the y-axis 2) The graph of f has a vertical asymptote at x=2 3) The graph of f passes

asked by Michael on July 30, 2016
3. ### College Algebra

Using the 7 steps outlined in section 4.3 of your book, analyze the graph of the following function: R(x) = x^2 - 49/x^4 - 16 Step 1: Factor the numerator and denominator of R and find its domain. If 0 is in the domain, find

asked by Kameesha on August 7, 2012
4. ### Math

1. Graph the points A ( -5,0) B ( -4, 3) and C ( 0, -4) A B C D 2. Identify the quadrant in which (3, -6) lies A II B IV C I D III 3. Determine which ordered pair is a solution of y = 2x - 3 A ( -2, 7) B ( 0, 3) C ( -4, -11 D ( 5,

asked by Justin on March 23, 2017
5. ### Maths

Given the equation y=2x-4 of an exponential function f 1)write down the equation of horizontal asymptote of f 2)determine the y intercept of f 3)determine the y value of a point on f with x=-2 4)draw the graph of the function of f

asked by Anonymous on May 12, 2015

More Similar Questions