ACT Math 5.1 Coordinate Geometry
ACT Math: Coordinate Geometry Drill 5, Problem 1. Simplify the expression.
|ACT Math||Coordinate Geometry|
|ACT Mathematics||Coordinate Geometry|
|Foreign Language||Arabic Subtitled|
|Product Type||ACT Math|
|Trigonometry||Solving trigonometric equations|
The origin, remember, is point zero, zero... and it lives right here on the graph.
Now we translate, or scoot over... 3 spaces to the left.
So we go 1 2 3 and get here; and now we move it down five spaces... 1 2 3 4 5... here.
We need to rotate it 90 degrees COUNTER clockwise.
So we're gonna move 90 degrees in THIS direction...
Just imagine that there's a string tied from the origin to the little point here.
Now put a clock face on it and it's 7 o'clock.
We want 4 o'clock, because from here to here is a right angle... or 90 degrees.
If we do that, then our point now exists at 5, negative 3...
...and voila - the answer is B.