The data slopes downwards from the left so its negative correlation.
Answer:
10π ft.
Step-by-step explanation:
Circumference = diameter * π.
Answer:
Reduced equaton is
.
Step-by-step explanation:
Given parametric equation is,
and 
Now,
substitute in second equation we get,



which is the corresponding rectangular equation after eliinating the parameter.
Now consider,

Of which,
Slope : 
when,






ans so on. Thus sketching th curve will look like given,
Final Answer is 4.5
= 4.5hours more time was used on games than on research.
You can work out the percentage change and that would help you work out the rate of appreciation :)
The formula is ((new value - old value)/old value) * 100.
So you do 
Therefore the rate of appreciation is 8% p/a.