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Tresset [83]
3 years ago
15

Need answer's ASAP

Mathematics
2 answers:
Elodia [21]3 years ago
8 0

To draw a scatter plot , we just need to draw two axis like coordinate axis and plot the given ordered pair inside this X-Y plane.

X Axis - Saving Account Balance                          Time(Y axis)

1300                                                                            1

2500                                                                          2

3600                                                                            3

4000                                                                             4

2200                                                                             5

1800                                                                              6

3200                                                                               7

900                                                                                 8

A scatterplot shows correlation between balance and duration i.e time. A correlation between two variables may be positive, negative, or no correlation depending upon how points are scattered on the coordinate plane.

Roman55 [17]3 years ago
3 0
You can use a graphing paper or a software to create a scatter plot. I used MS Excel to plot the points. You simply have to type the values and create a graph. The x-axis is the number of years and the y-axis is the savings account balance.

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xz_007 [3.2K]

Answer:

The range of given data set is 90.

Step-by-step explanation:

We are given the following data:

20.9, 33.1, 21.8, 58.5, 23.5, 110.9, 30.4, 24.9, 74.1, 60.3, 40.4, 45.4

When this data is arranged in ascending order, we get:

20.9 , 21.8 , 23.5 , 24.9 , 30.4 , 33.1 , 40.4 , 45.4 , 58.5 , 60.3 , 74.1 , 110.9

Range is a measure of dispersion and can be easily calculated.

Formula:

Range = \text{Maximum values - minimum value}

Range = 110.9 - 20.9 = 90

Thus, the range of given data set is 90.

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3 years ago
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It takes 3 hours to paddle a kayak 12 miles downstream and 4 hours for the return trip upstream. Find the rate of the kayak in s
Furkat [3]

The rate of the kayak in still water is 3.5 mph

<h3><u>Solution:</u></h3>

Given that It takes 3 hours to paddle a kayak 12 miles downstream

Distance covered in downstream = 12 miles

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Also given that it takes 4 hours for the return trip upstream

Distance covered in upstream = 12 miles

Time taken to cover upstream = 4 hours

<em><u>Formula to remember:</u></em>

If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then: Speed downstream = (u + v) km/hr and Speed upstream = (u - v) km/hr

Let the speed of Kayak in still water = x mph

And The speed of current = y mph

For downstream:

Speed downstream = x + y

We know that speed = \frac{distance}{time}

\frac{distance}{time} = x + y

x + y = \frac{12}{3}

x + y = 4  ------ eqn 1

<em><u>For upstream:</u></em>

Speed upstream = x - y

\frac{12}{4} = x - y

x - y = 3 -------- eqn 2

Now let us eqn 1 and eqn 2

Add eqn 1 and eqn 2

x + y + x - y = 4 + 3

2x = 7

x = 3.5

speed of Kayak in still water = x mph  = 3.5 mph

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3 years ago
Which ordered pair is the best estimate of the solution of the system 3x+y=4 x-3y=4?
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6 0
3 years ago
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