Senpai in taking my final can someone write the answers for these or how it works ? Pleaaase
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>>75967
This.
Your test is sophomore level math.
>>75952
y = ax^2 + bx +c
= a(x^2 +(b/a)x + (c/a))
The graph is stretched in y-direction by the factor a
compared to the graph of y = x^2 + (b/a)x + (c/a)
>Vertex / line of symmetry
x = -b/(2a) is the line of symmetry, put it in the formula to obtain the y-value of the vertex.
>y-intercept
set x = 0, look at the constant term in the formula
>x-intercepts
set y = 0, calculate the zeros with the usual formulas.
protip: check your sketches with wolfram alpha, but try to do it before alone.
Example:
http://www.wolframalpha.com/input/?i=plot+x%5E2+from+x%3D-2+to+2
>>75967
He could have flunked sophomore 2 or more times.
That knowledge is forbidden.
>>75992
I did this shit in 7th grade.
dont be a dumbass
