Hello,
Magnetude is the norm of the vector=V13
Polar angle=arctan(2/3) ==>33.69...°
The correct answer is (0, 3)
Multiplying a function by a constant factor (10 in this example) stretches the graph relative to the x-axis. If f(x) would be a sine, you would blow up the amplitude from -1..+1 to -10..+10.
