Are you talking about normal hydraulic power steering, or is this part
of a mechanic's exam where you have to describe how electric power
steering works?

Until we  get  to true steer-by-wire, the front steering angle of the
wheel plane is proportional (or approximately so) to the angle through
which the wheel and shaft are turned.  The torque merely determines how
fast you turn the wheel and how much effort you need to put into it.

The torque per degree of movement does depend on vehicle speed, wieght
on front wheels, and front end geometry (caster, etc.).  But the road
wheel plane still turns proportional to shaft movement with the
correction that  the ackerman angles figured in.  That is, with no
ackerman, the wheel angle is close to steering wheel displacement.

At racing speeds one can almost ignore the non-proportionality built in
to aid parking on some cars.