Plz i am confused
15 and or 16

15. It is a function

16. It is a function

Mapping diagram is attached for reference.

Step-by-step explanation:

Mapping diagram is a set of two parallel columns.

The first column includes the 'domain'.

And the second column includes the 'range'.

A relation is a function,

if every domain () has only one range ()

The given coordinates in the set form are in the form ()

15.  We observe that each '' is attached to only one ''

Therefore this relation is a function.

16. We observe that here also each '' is attached to only one ''

Therefore this relation is also a function.

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47

ummm seems that u didnt post the attachement !