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It is (6, 1).
You went 360o in the same direction, so you end up with a circle.
The answer depends on the centre of rotation. Since this is not given, there can be no answer.
If you imagine moving the second hand of a clock in a natural numerical direction (i.e. past 1, then 2, then 3, then 4 etc), that is clockwise. The direction of a clock is clockwise. Past the 1, then 2, then 3 etc. Or past the 90 degree, then 180, then 270 degree marks. The opposite direction of clockwise is anticlockwise or counterclockwise (both words mean the same). If you apply the term clockwise to hurricanes or other circular-motion phenomena, it is a movement analogous to clock movement, past the 90 degree, then 180 degree, then 270, then 360 degree marks.
All rotations, other than those of 180 degrees should be further qualified as being clockwise or counter-clockwise. This one is not and I am assuming that the direction of rotation is the same as measurement of polar angles. Also, a rotation is not properly defined unless the centre of rotation is specified. I am assuming that the centre of rotation is the origin. Without these two assumptions any point in the plane can be the image. With the assumptions, for which there is no valid reason, the image is (3, -4).
It is (-6, -1).
It is (6, 1).
You went 360o in the same direction, so you end up with a circle.
There are 270 degrees in 3/4 of a rotation
Both will end up on the same place. Using a compass rose as an example: 270 clockwise will point to the west. 90 counterclockwise will also point west.
(x,y) to (x,-y). You would keep the x the same, but turn the y negative. This is actually the rule for a 90 degree counterclockwise rotation, but they're the same thing, they would go to the same coordinates.
The answer depends on the centre of rotation. Since this is not given, there can be no answer.
305
(-5,3)
Point A has coordinates (x,y). Point B (Point A rotated 270°) has coordinates (y,-x). Point C (horizontal image of Point B) has coordinates (-y,-x).
(x,y) to (x,-y). You would keep the x the same, but turn the y negative. This is actually the rule for a 90 degree counterclockwise rotation, but they're the same thing, they would go to the same coordinates.
The effect of the rotation is the same as that of a 90 degree clockwise rotation. In matrix notation, it is equivalent to [post-]multiplication by the 2x2 matrix: { 0 1 } {-1 0 }