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stiv31 [10]
3 years ago
13

A teacher wants to know how much she can predict a student’s reading level from their grade level in given school district. The

table shows the grade and reading levels of eight students

Mathematics
2 answers:
Sergio039 [100]3 years ago
6 0

Answer:

Step-by-step explanation:

x y xy x^2 y^2

     

7.1 7.1 50.41 50.41 50.41

6.2 6.2 38.44 38.44 38.44

10.3 10.3 106.09 106.09 106.09

4.5 4.5 20.25 20.25 20.25

9.7 9.7 94.09 94.09 94.09

8.3 8.3 68.89 68.89 68.89

7 7 49 49 49

6.4 5.5 35.2 40.96 30.25

Mean 7.4375 7.325 57.79625 58.51625 57.1775

     

Cov 3.3165625 r #DIV/0!  

r 0.987954244    

r^2 0.976053588  

The coefficient of determination r square is 97.60%

Hence 97.6% variation is explained by changes in grade level

Nearest answer is option b  

bogdanovich [222]3 years ago
5 0
I think the awnser to this question is c am i right?
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Find the measure of each angle in the isosceles trapezoid.
Scrat [10]

Answer:

Below in bold.

Step-by-step explanation:

m < C = m < D = 64 degrees

m <A + m < D = 180

m < A + 64 = 180

m<A =  180 - 64 = 116 degrees.

m < B = m< A = 116 degrees.

4 0
2 years ago
What is <br><br>-7x3(4+-5)=​
nlexa [21]

\text{Hey there!}

\bf{-7\times(4+(-5))}

\bf{First, you\ need\ to\ do \ is\ PEMDAS}\\\\\\\text{Parentheses, Exponents, Multiplication, Division,Addition\ \& Subtraction}

\bf{ -7\times3(4+(-5))}\\\bf{-7\times3=-21}\\\bf{-21(4+(-5))}\\\bf{4+(-5)= -1}\\\bf{-21\times-1=21}\\\\\boxed{\boxed{\bf{Answer: 21}}}\checkmark

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6 0
3 years ago
Find the equation of the line containing (3,-2) and (5,5).
Mars2501 [29]

Answer:

y = 3.5x - 12.5

Step-by-step explanation:

First, find the slope using rise over run (y2 - y1 / x2 - x1) with the 2 points:

(-2 - 5) / (3 - 5)

-7/-2

= 3.5

Then, plug the slope and a point into y = mx + b to solve for b:

y = mx + b

5 = 3.5(5) + b

5 = 17.5 + b

-12.5 = b

Plug the slope and the y intercept into the equation y = mx + b

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7 0
3 years ago
Read 2 more answers
HElP ASAP! Explain what happens when the formula for slope is applied to a vertical line.
sineoko [7]
<span>you'll find the denominator is zero which isn't possible, so you'll get undefined. </span>
6 0
3 years ago
Given that (5,-8) is on the graph of f(x), find the
FinnZ [79.3K]

Answer:

The corresponding point is (3,-8)

Step-by-step explanation:

we know that

When you add a constant value (k), to the argument of a function, the graph is shifted  k units to the left.

so

In this problem

The rule of the transformation is equal to

f(x) ------> f(x+2)

(x,y) ------> (x-2,y)

(5,-8) -----> (5-2,-8)

(5,-8) -----> (3,-8)

8 0
3 years ago
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