Question 55091: Please help Graph- f(x)=x^2-3
Found 2 solutions by rchill, funmath:
Answer by rchill(405)   (Show Source):
You can put this solution on YOUR website! That should graph to a parabola as it is a polynomial of 2nd degree. To plot it, you can use a graphing calculator (there are several free ones online), or you can use the discriminant formulas, or you can just use various values of x to solve for y. The graph is:
Answer by funmath(2933) (Show Source):
You can put this solution on YOUR website! Graph- 
This is a parabola in standard form:  .
We can find the axis of symmetry by this formula: 
Our a=1, b=0, c=-3
The axis of symmetry:  x=0 (Note this is the x value of the vertex.)
We use the axis of symmetry to intelligently pick points to plot:
Plot (-1,f(-1)), (0,f(0)), and (1,f(1))
Let x=-1: f(-1)=(-1)^2-3=1-3=-2. Plot (-1,-2)
Let x=0: f(0)=(0)^2-3=0-3=-3. Plot (0,-3) (vertex)
Let x=1: f(1)=(1)^2-3=1-3=-2. Plot (1,-2)
Connect the dots and you get:
Happy Calculating!!!
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