SOLUTION: I have to indentify the following components of each quadratic function then graph the function. 1. y=x^2 +2x -3 axis of symmetry x= -b/2a:____

SOLUTION: I have to indentify the following components of each quadratic function then graph the function. 1. y=x^2 +2x -3 axis of symmetry x= -b/2a:_____ ( i got -4, i can't remember ho

Question 261133: I have to indentify the following components of each quadratic function then graph the function.
1. y=x^2 +2x -3
axis of symmetry x= -b/2a:_____ ( i got -4, i can't remember how I got this)
vertex(-b/2a,y):______
y-intercept (c):_______
two other points:______
I am in cyber school and I can get how to do this. Please help.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
I have to identify the following components of each quadratic function then graph the function.
:
1. y = x^2 + 2x - 3
axis of symmetry x= -b/2a:_____ ( i got -4, i can't remember how I got this)
In this equation using the form ax^2 + bx + c; a=1, b=2; axis of symmetry formula
x =
x =
x = -1, is the axis of symmetry
:
vertex(-b/2a,y):______
Substitute the value of x you had for the axis of symmetry
y = x^2 + 2x - 3
y = -1^2 +2(-1) - 3
y = 1 -2 - 3
y = 4
Vertex: x=-1; y=-4
:
y-intercept (c):_______
y intercept occurs when x=0
y = 0 + 2(0) - 3
y = -3 is intercept
:
two other points:______
Choose two points for x, and find y
x = -2
y = -2^2 + 2(-2) - 3
y = 4 - 4 - 3
y = -3
1st point: -2, -3
:
x = +2
y = 2^2 + 2(2) - 3
y = 4 + 4 - 3
y = 5
2nd point: 2, 5
:
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