quadratics Flashcards
when you graph a parabola what do you do first?
set the equation equal to 0 to find the roots
What do you do second when you have a coordinates roots in a parabola?
you find the axis of symmetry and plug that into the original problem to find the y value of the vertex
What is the quadratic equation?
y=ax^2+bx+c
what is a in the quadratic equation?
a is the second difference divided by 2.
How do you know if the model is quadratic?
the second difference is the same. that is your a
what is the exponential equation?
y=xf^x
what is x in the exponential equation?
x is the y coordinate when x is zero.
what is r in an exponential equation?
r is the growth value of y in the table.
what is the linear equation.
y=mx+b
how do you find m in the linear equation?
you divide the y changing factor by the x changing factor.
what is b in a linear equation.
b is the y value when x is zero.
what do you look for when solving problems with square roots?
you look for perfect squares.
what do you look for when solving equations?
What x equals.
What we is the quadratic formula?
you knownthis
what is the b equation so find x in projectile motion
-b/2a
how do you find the y value of the vertex ?
plug the axis of symmetry back into your problem.
when you graph intercept form, what do you do first?
first you find the roots. always the opposite signs if in parentheses.
what is a in this problem for graphing in intercept
y=2(x+3)(x-1) form?
a is 2
how do you find the y value in the vertex?
you plug in the axis of symmetry into the original problem
