Answer:
The third one
not sure bu i am working on this to so might be right
First simplify the equation and next multiply the 20 with the x^2 and find a number that adds together to give you the middle
12%... (3×4)/(25×4) = 12/100... 12/100 = .12 which is 12%
Glass and Titanium. Glass is because (10,40) (y over x) is 4 and Titanium is because (10,60) is 6 cork and lead are not since when dividing y over x it doesn't equal 2.
C = is the correct answer
