# What transformation transforms (p, q) to (q, p)?

##
a reflection over the y-axis

a rotation of 90° about the origin

a reflection over the x-axis

a reflection over y = x

a reflection over the y-axis

a rotation of 90° about the origin

a reflection over the x-axis

a reflection over y = x

##### 1 Answer

Oct 26, 2016

If we wish to map

For example, take

#x = y^2#

#y = pmsqrt(x)#

Both (

**Original**

graph{x^2 [-10, 10, -5, 5]}

**Inverse** (

graph{(y - sqrt(x))(y + sqrt(x)) = 0 [-10, 10, -5, 5]}