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3 years ago

Scatter Plot Question

Mathematics

2 answers:

Fiesta28 [93]3 years ago

7 0

a) y=9/8x+20

b) 76.25

mixas84 [53]3 years ago

5 0

Answer:

(a) y = 15 + x

(b) Quiz score will be 65.

Step-by-step explanation:

Line of best fit is the straight line which represents our scatter plot in the best way. This straight line is said to be best if the sum of the distances between the points and the line is small.

Its equation is of the form: y = a + bx , where a is intercept and b is the slope.

(a). The approximate equation of the line of best fit can be: y = 15 + x

Because line meets the y-axis nearly (0, 15).

Also here y represents the quiz score and x represents the time spent in studying.

(b) If y = 15 + x be the equation of best fit then,

Time Spent in Studying(y) = 15 + 50 = 65 minutes.

Since, quiz score(x) = 50 minutes.

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What is the median of the following numbers?<br> 9,8,1, 8,5

Zolol [24]

Answer:

Step-by-step explanation:

1, 5, 8, 8, 9

Find the middle number. If there is 2 add them and divide them by 2

But there is 1 middle number 8

3 0

3 years ago

Rewrite the equation in vertex form. Name the vertex and y-intercept. y=3/5x^2+30x+382

Serga [27]

<span>(y-7) = 3/5 (x+25)^2 so the y intercept is -7 and the vertex is 35

</span>

7 0

3 years ago

Read 2 more answers

Item 18

nasty-shy [4]

The first thing we have to do is to calculate the midpoint of the min and max speeds. We are given that the min and max is 74 and 95 respectively. The midpoint is then calculated as (max+min) / 2. Therefore:

midpoint = (74 + 95) / 2 = 84.5

Next, we calculate the distance from the midpoint to the endpoint by doing subtraction. Therefore:

min endpoint: 84.5 – 74 = 10.5

max endpoint: 95 – 84.5 = 10.5

Now we know that v minus the midpoint will equal the distance such that:

| v - midpoint | = distance.

To our problem,

| v – 84.5 | = 10.5

7 0

3 years ago

A bakery recorded the number of muffins and bagels it sold for a seven day period. For the data presented, what does the value o

atroni [7]

Answer:

Mean of bagel

Step-by-step explanation:

Working out each of the statically summaries Given in the option :

Mean of muffin :

Mean = Σx / n

n = sample size

(61 + 20 + 32 + 58 + 62 + 61 + 56) / 7

= 350 / 7

= 50

Mean of bagel :

Mean = Σx / n

n = sample size

(34 + 45 + 43 + 42 + 46 + 72 + 75) / 7

= 357 / 7

= 51

Hence, from the result obtained, we could see that the value of 51 summarizes the mean of bagel.

3 0

3 years ago

Does anyone know the answer?

Flura [38]

<h3>Answer: 41.19 degrees</h3>

==========================================

Work Shown:

See the diagram below.

tan(angle) = opposite/adjacent

tan(A) = BC/AC

tan(A) = 7/8

A = arctan(7/8)

A = 41.1859252

A = 41.19 degrees

7 0

3 years ago