1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kvv77 [185]
3 years ago
11

15 points and BRAINLIEST John and his sister each bought a car in 2005. John's car cost $3,000 and is decreasing in value $150 p

er year. The value () of his sister's car x years after 2005 is given by
the function V(x) = 250x + 4,000. Which statement correctly compares the values of the cars from 2005 until 2017?

Mathematics
1 answer:
nignag [31]3 years ago
5 0

Answer:

C

Step-by-step explanation:

You might be interested in
Can somebody please help me asap
Olenka [21]
The slope is 2/3 and the y intercept is -3
5 0
2 years ago
The table shows the number of medical clinics and the number of bowling alleys in several cities.
DedPeter [7]

Answer:

Step-by-step explanation:

a) to create a scatter plot for the data, let data for clinics be x and that one for Bowling alleys be y then plot x values with corresponding y values on a graph tool.

<u>x                     y</u>

14                   12

1                      3

6                     6

5                     7

10                    7

6                      8

11                      9

8                      15

6                       7

16                     12

The scatter plot is attached below

b) a cluster is a group of data that is close together. From the plot, the ordered pairs forming a cluster are;

(6,6), (6,7), (5,7), and (6,8)

c) An outlier is a point in a plot which lies very far from the other values. In this case, point its  point (8,15)

d)The linear regression equation is one written in the form of

Y=a+bX where ;

Y=the dependent variable

X=the explanatory variable

a=the intercept, which is the value of y when x=o

b=slope of the line

The formula to apply here is ;

a=(∑y)(∑x²)-(∑x)(∑xy) / n(∑x²)-(∑x)² where n is number of samples

b= n(∑xy)-(∑x)(∑y) / n(∑x²)-(∑x)²

Form a table like below

<u>x                     y               xy               x²                 y²</u>

14                   12              168            196              144

1                      3                 3               1                   9

6                     6                 36            36                 36

5                     7                 35             25                49

10                    7                 70             100              49

6                      8                 48             36              64

11                      9                99             121               81

8                      15               120             64            225

6                       7                42               36              49

16                     12                192            256            144

83                     86              813           871               850------------sum

∑x=83   ∑y=86  ∑xy=813  ∑x²=871  ∑y²=850 and n=10

Applying the formula

a=(∑y)(∑x²)-(∑x)(∑xy) / n(∑x²)-(∑x)²

a=[(86 * 871) - (83*813) ]/ 10 (871-83²)

a=[74906 - 67479] / 10(-6018)

a=[7427] / -60180

a= - 0.1234

b= n(∑xy)-(∑x)(∑y) / n(∑x²)-(∑x)²

b=10(813)-(83*86) / 10 (871)-(83²)

b=[8130-7138] / 8710 -6889

b= 992/1821

b=0.5448

The liner regression equation will be;

Y=a+bX

Y= -0.1234 + 0.5448 X

e) correlation coefficient r is given by;

r= n∑xy - (∑x)(∑y) / √n(∑x²)-(∑x)² × √n(∑y²)-(∑y)²

r=10*813 - (83*86) / √10 *871 -83² ×√10*850 - 86²

r=8130-7138 / √8710-6889 × √8500-7396

r= 992 / (√1821 × √1104)

r=992/ 42.67×33.23

r=992/1417.9

r=0.6996

f) r² is important because it shows you the proportion of the variance of one variable that is predictable from the other variable.

r=0.6996

r²=0.6996² =0.4894

8 0
3 years ago
Read 2 more answers
2/5,1.4,1/3,0.5 in least to greatest
Jobisdone [24]
 1/3 2/5 0.5 1/4 here is ur answer



8 0
3 years ago
Read 2 more answers
PLEASE HELP HELP ASAP
Anit [1.1K]

Answer:

12.7311111111111 on and on

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
How many sides does a regular polygon have, if each exterior angle measures 60?
DaniilM [7]
In a regular polygon, each exterior angle equals each central angle.
central angle = 360 / #sides
#sides = 360 / central angle
#sides = 360 / 60
#sides = 6


7 0
3 years ago
Other questions:
  • Two candidates run for class President. The candidate that won received 60% of the 260 total votes. How many votes did the winni
    8·1 answer
  • -6+3y=12 solve for x
    6·1 answer
  • I need help can someone help.​
    7·1 answer
  • If you have an 80 average so far in class after 3 tests what would you need to get on the fourth test to have an average of 83?​
    11·1 answer
  • No real numbers are irrational numbers
    11·2 answers
  • The dimensions of Olivia’s room are 11.25 feet by 10 feet. Find the area of Olivia’s room.
    15·1 answer
  • Which represents the numbers in order from least to greatest?<br> 9%, 9/10, 9. -9/1
    14·1 answer
  • Someone please answer this!!
    9·1 answer
  • A hat contains four balls. The balls are numbered 2, 4, 4, and 7. One ball is randomly selected and not replaced, and then a sec
    14·1 answer
  • Plase help me thanks you!
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!