I'm guessing you want an equation.
In that case, the equation would be $2x =y
Answer:
0.14
0.29
0.21
0.27
18.38
0.83
Step-by-step explanation:
Answer: The ice sheet's thickness decrease every 6 weeks= 1.5 meters
Step-by-step explanation:
GIven: At the beginning of spring, the ice starts to melt. The variable sss models the ice sheet's thickness (in meters) t weeks after the beginning of spring. 
At t=0, 
So, Thickness of ice sheet at the beginning = 4 meters
Now at t= 6, we get

Thickness of ice sheet after 6 weeks = 2.5 meters
Decrease in thickness = 4 meters - 2.5 meters = 1.5 meters
Hence, the ice sheet's thickness decrease every 6 weeks= 1.5 meters
Remember Rise/Run
So in this one you would start at -7 on the y-intercept, and then go down one, and over to the right two.
angle U and angle I are suppose to go together