Jenny catches a taxi from the supermarket to her house. The taxi firm charges $3.00 standing charge, plus 50 cents per kilometre
1 answer:
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Answer:
a) From the chart crated with Microsoft Excel, we have that the correlation coefficient, r = √0.8581 ≈ 0.93 to the nearest hundredth
The steps used includes
1) Inputting the given data into the cells on a Microsoft Excel spread sheet
2) Highlighting and sorting the data in the cells in order of increasing Rainfall
3) Generating a dot plot using the sorted data from above
4) Adding the trend line, Square of the linear regression, and the trend line equation
5) Adding the axis labels
(b) The correlation coefficient states that there is a strong positive correlation between the monthly rainfall and and Umbrella sales
Step-by-step explanation:
Answer:
Option A.
Step-by-step explanation:
The given function is
Leading coefficient is positive, so it is an upward parabola. Vertex of an upward parabola is the point of minima.
Vertex of a parabola is
In the given function a=0.15, b=-6 and x=400.
At x=20,
So, minimum value of f(x) is 340 at x=20.
From the given table it is clear that the minimum value of g(x) is 55 at x=70.
Since 55 < 340, therefore, g(x) has a lower minimum values, i.e, (70,55).
Hence, option A is correct.