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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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Greta must volunteer 225 hours for a community service project. She plans to volunteer for 6 hours

klemol [59]

Answer:

A. "an arithmetic sequence with a common difference (d) of -6."

B. 33 hours

C. $a_n=a_1+(n-1)d$

D. See below

Step-by-step explanation:

Since the sequence lessens by 6, this is an arithmetic sequence with a common difference (d) of -6.

The formula for term of arithmetic sequence is:

$a_n=a_1+d(n-1)$

Wher a_1 is the first term and d is the common difference. Since we want to find after 33 weeks, we plug in 33 into n:

$a_{33}=225 + (-6)(33-1)\\a_{33}=33$

She will have left 33 hours

We will use the arithmetic sequence term formula written above, that is:

$a_n=a_1+(n-1)d$

THis gives us the amount of hours left after a certain number of weeks.

We plug in 40 into n and find the hours left:

$a_{40}=225+(40-1)(-6)\\a_{40}=225-234\\a_{40}=-9$

THis term is NEGATIVE, which means that Greta will not have to work 40 weeks to fulfill the target of 225 hours. She needs to work less.

6 0

3 years ago

2. Which of the following statements is FALSE?

castortr0y [4]

Answer:

Step-by-step explanation:

Option C

Is the correct answer

Please mark as brainilest

3 0

2 years ago

Read 2 more answers

Can someone plz help me with this one problem plzzz!!!

tresset_1 [31]

so, you just use the x's from the table and plug them into the equation to find the y.

y=(1)+9

y=10

y=(2)+9

y=11

y=(3)+9

y=12

y=(4)+9

y=13

i hope this helps :)

6 0

3 years ago

Solve for x triangles

wel

Answer:

115

Step-by-step explanation:

180-50=130

130/2=65

180-65=115

4 0

2 years ago

You have a coupon for an additional 25% off the price of any sale item at a store. The store has put a watercolor kit on sale fo

telo118 [61]

Final price=original price*(100%- discount 1)(100%-discount 2)
original price=$40
discount 1=25%⇒ 100 - discount 1=100%-25%=75%=75/100=0.75
discount 2=15%⇒ 100 - discount 2=100%-12%=85%=85/100=0.85

original price=$40(0.75)(0.85)=$25.5

Answer: $25.5

4 0

3 years ago