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1 year ago

What is an equation of the line that passes through the points (8,-4) and (6,-5)?

Mathematics

1 answer:

mina [271]1 year ago

4 0

Answer:

y=1/2x-8

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(-5-(-4))/(6-8)

m=(-5+4)/-2

m=-1/-2

m=1/2

y-y1=m(x-x1)

y-(-4)=1/2(x-8)

y+4=1/2(x-8)

y=1/2x-8/2-4

y=1/2x-4-4

y=1/2x-8

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The graph below represents the following system of inequalities.

jonny [76]

Answer:

I believe the answer is D

Step-by-step explanation:

4 0

2 years ago

3. A set of n = 18 pairs of scores (X and Y values) has SSX = 20, SSY = 80, and SP = 10. If the mean for the X values is MX = 8

Karo-lina-s [1.5K]

Answer:

a. Pearson Correlation

r= $\frac{1}{4}$ or 0,25

b. The regression equation is

$Y = 6+ 0,5 *X$

Step-by-step explanation:

a. Pearson Correlation

Using the equation for Pearson correlation:

$r = \frac{SP}{\sqrt{(SS_{x} * SS_{y})} }$

$r= \frac{10}{\sqrt{(20 * 80)} }$

$r=\frac{10}{\sqrt{1600} }$

$r=\frac{10}{40} =\frac{1}{4} = 0,25$

b. Regression

Using regression equation

1. $Y = a+ b *X$

2. $a= m_{y} - b* m_{x}$

3. $b= \frac{SP}{SS_{x} }$

So replacing first 'b' because is content in 'a' equation

$b= \frac{SP}{SS_{x} }$

$b= \frac{10}{20}$

$b= \frac{1}{2} = 0,5$

Knowing 'b' can know 'a' and complete the equation

$a= m_{y} - b* m_{x}$

$a= 10 - 0,5* 8$

$a= 6$

Replacing in the equation 1:

1. $Y = a+ b *X$

$Y = 6+ 0,5 *X$

3 0

2 years ago

Jerome Anthony are reading the same book drumhedz already read 46 pages in feet and additional 7 page per night Cindy has read 2

german

Answer:yo

Step-by-step explanation:

7 0

2 years ago

The figure below shows two half-circles at the ends of a rectangle with the dimension shown.

timurjin [86]

Answer:

D. 154

Step-by-step explanation:

The area of the rectangle is 15*5= 75 inches

The area of the 2 semicircles combined, which make a circle, are:

π*r², where r is 5

r²=25

π*25=78.53981633

75 + 78.53981633 is about 154

5 0

1 year ago

949 nearest 10 and 100

stellarik [79]

The nearest 10 is 50 and the the nearest hundred is 900

6 0

3 years ago

Read 2 more answers