Yintercept is the point where the line crosses the y axis and where x=0
(x,y)
yintercept at y=b is
(0,b)
Step-by-step explanation:

You draw the reference angle of 45° but clockwise. The exact value of sin(-345°) is 1/√2.
The value of the 3 in 6300 os 300 and it is ten times as many as the 3 in 530