The answer is 59. First you multiply 4 by 5 (20), then subtract 20 from 79 (59).

let x be y and y be the x, so we have




All you have to do is add how much she withdrew to how much she has left.
548 + 225 = 773
So Brita originally had $773 in her account.
The graph of f(x) = sqrt( 4x) looks like this. So choose the one that looks like the image attached.
Everything is in the picture. All transformations are on y so entire functions gets affected