Answer:
A) Price= 1617*Year - 3.116e+006; B) 150340$ By 2020
Step-by-step explanation:
We have a data set of 7 x, y pairs, this data set can be modelled as line, applying a linear regression calculator we found that the trend line can be modelled as Price= 1617*Year - 3.116e+006
Attached you will find the regression results where x is the year variable and Y is the price. If we now plug year=2020 in the equation we have:
Price=1617*2020-3.116e+006 = 150340$
Answer:
The speed of the boat is 20 km/hr
Step-by-step explanation:
Let s be the speed of boat in still water
Let d be the distance
Upstream speed = s-4
Jane took 30 min to drive her boat upstream to water-ski at her favorite spot.
So, Distance traveled in upstream =
Downstream speed = s+4
So, Distance traveled in downstream =
So,
30s-120=20s+80
10s=200
s=20
Hence The speed of the boat is 20 km/hr