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
Elan Coil [88]
2 years ago
15

What is the equation of the line that has a slope of -2 and passes through the point (1,2)

Mathematics
1 answer:
vodka [1.7K]2 years ago
6 0
Y=2x+2
(y=mx+c
m-slope/gradient
c-y intercept)
You might be interested in
Nadia started at 19.26 feet below sea level and then changed her altitude by climbing a total of 5,437.8 feet up from her initia
Schach [20]
5,418.54 Feet above sea level
5 0
2 years ago
I need to turn this in by tomorrow!!!!! PLEASE HELP ME.
AlladinOne [14]

Step-by-step explanation:

Alternate interior angles :- 1 , 4

corresponding angles :- 3

same side interior angles :- 2 , 5 , 6

4 0
3 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
Simplify the following ratio<br> 12:1
const2013 [10]

Answer:

12:1

………………………………………………

brainiliest me then i can follow you pleasee

6 0
2 years ago
Read 2 more answers
Derrick and Sam need 10 pounds of colored gravel for the bottom of their new fish tank. Derrick has 2 pounds of purple gravel an
Sunny_sXe [5.5K]

Answer:

4 yellow gravel . 2+4=6

10-6= 4

8 0
3 years ago
Other questions:
  • Justin has 34 quart of cranberry. if you divide the juice into glasses that hold 18 quart how many classes can justin fill?
    6·1 answer
  • Perimeter of trapezoid 13.1 inches by 5.8 inches by 5.4 inches by 16
    10·1 answer
  • The image shows a portion of a bridge supported by two vertical pillars built from the points B and C on the slope below. The le
    5·2 answers
  • An airplane is preparing to land at an airport. It is 51,300 feet above the ground and is descending at the rate of 3,000 feet p
    13·1 answer
  • Jenna must run a total of 12 miles on Monday.
    7·1 answer
  • Need help with #3.<br>What are the common factors of 20w and 40wz
    11·2 answers
  • A lawn service owner is testing new weed killers. He discovers that a particular weed killer is effective 89% of the time. Suppo
    7·2 answers
  • Help me please, i don't know this
    10·1 answer
  • Tina ate 21 starbursts. If she ate 35% of the package of Starbursts, how many Starbursts are in the package?
    7·1 answer
  • Answer This Please With explanation If You do I Will Mark Brainliest
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!