(4,1) slope = 2 , point slope form

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?