The answer is 3.075.
If you divide 12.30 4 you'll get 3.075.
I think the correct answer here would be 1.8 units because this is a proportional triangle. Since we know the larger height is 5, and the smaller height is 1, we know that if we divide 9 by 5 (to create the same proportion) we will find that x=1.8.
Just by looking at 14 it will be non linear since any equation that has an exponent will automatically be non linear and will not form a straight line. 13 would be linear as when you subtract x from both sides you’ll have a straight line meaning it’s linear. And 12 will be linear because the equation once into y=mx+b format it will be y=-2x/3+7/3 making a straight line if graphed correctly.
