Functions as graphs | Functions and their graphs | Algebra II | Khan Academy

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Algebra II on Khan Academy: Your studies in algebra 1 have built a solid foundation from which you can explore linear equations, inequalities, and functions. In algebra 2 we build upon that foundation and not only extend our knowledge of algebra 1, but slowly become capable of tackling the BIG questions of the universe. We'll again touch on systems of equations, inequalities, and functions...but we'll also address exponential and logarithmic functions, logarithms, imaginary and complex numbers, conic sections, and matrices. Don't let these big words intimidate you. We're on this journey with you!

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[eiraf]

10 years on, and still as helpful as ever! :)

[julialong]

I do K12 and I absolutely love it, but I always get lost in math. Khan Academy helped me so much!!! I probably would have failed Algebra 1 but they helped me get straight As!

[Piecakesman]

would f(x) = (Square root of X^2)/2 also be a valid answer for question 6 "write the function rule for each graph"?

[xlTeamAliasxl]

he sounds like the bee from the mucinex commercials, but i really like the in depth explanations, wayyyy bettr than my teachers.

[ArranitM]

I'm 36 and retaking some high school classes in order to get into a nursing program. Thank you for making math actually make sense for the first time in over two decades!

[mariorobleto]

X(horizontal) coordinate is always first then the Y(vertical) coordinate...

[NightNinja]

Not as helpful as I'd hoped. I'm sorry could you explain that a little easier. Its just I am NOT one of those people that get math Easily.

[cabumbum]

it would have been easier to explain that functions are only one-one mapping and many-one mapping but not one-many and many-many

[Justmeandmythoughts]

How do I know which number to write first ? This is on the test so I don't wanna get #'s backwards.is cordnt.first or excordnt.how do I know what to write down first on the test?? Please anyone?!

[pricillapadilla]

Can you do a video for different varied fractions for the answer of the function rule. It hard for me to  plot fractions although I understood this problem. Also how does the absolute value work here? 

[sprinttomax]

why is it important to know if a relation is a function or not?

[aalokhardikar]

Helping me. Since I barley pay attention to class since it is so boring. Man you have done such great to the world you deserve a Nobel prize

[raichuk]

How do I find the domain and the range for problems 10a and 10b?

[LucyRockprincess]

very helpful ty i learned ALOT believe me