Question

rotate point c 90° counter - clockwise about the origin. enter the new coordinates. c = ( ?, )

Explanation:

Step1: Recall rotation rule

The rule for a 90 - degree counter - clockwise rotation about the origin is $(x,y)\to(-y,x)$.

Step2: Apply the rule

Given point $C(1,4)$, substituting $x = 1$ and $y = 4$ into the rule, we get $(-4,1)$.

Answer:

$C'=(-4,1)$