How can you tell if a table is proportional or non proportional?

You can tell if a table is proportional if the x and y-values change at a constant rate.

For example:

x    y

0    2

1     4

2    6

3    8

This table is proportional, because the x values change at one at a time, and the y values change at 2 at a time.

Let me know if this helps!

(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