Answer:
(Check message's below my answer for link to go to the graph on desmos because this is not allowing the link. :( It'sts not anything bad or of that sort, just trust me please.)
3. A = (0,3) B = (4,2) C = (1,-1)
4. A = (-3,0), B = (1,-1) C = (-2,-4)
Step-by-step explanation
Direction of Rotation: Counterclockwise or clockwise direction. Positive rotations are counterclockwise. Negative rotations are clockwise. For example, to rotate the point (2, 5) counterclockwise about the origin by 90 degrees, we use the rule: (x,y)→(−y,x) ( x , y ) → ( − y , x ) .