Only two points are given. An infinite number of functions can be written that will have graphs going through those two points. We have to assume the only one you're interested in is the linear function.
You can use the 2-point form of the equation for a line to find the function, then use that to fill in the table.

Using this rule Output = Input -2, we can fill in the function table.
Answer:
4.5
Step-by-step explanation:
Without calculation, you can notice 60 deg= 2*30 deg
The answer options relevant to this is 4.5
other numbers are too much for this triangle
X= 100 degrees. sorry if i answered too late
Those are adjacent angles. They equal 180 degrees.
10x-20+6x+8= 180
16x-12=180
Add 12.
16x= 192
x=12
I hope this helps!
~kaikers