Anybody me with i have a very important grade relying on this

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

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

If value of cos330° is √3/2 then find tan165°.