Using the graphs below, identify which value of r, the correlation coefficient, best describes
the graph,
Class A
Class B
Closs
Class D
Class E
Class F
.

C

Step-by-step explanation:

Class A r=   0.7137

Class B r=  0.4653

Class C r=  -0.9855

 Class D r= -0.7198

 Class E r=  0.9888

 Class F r=  -0.4723

Class A r= 0.7137

Class B r= 0.4653

Class C r= -0.9855

Class D r= -0.7198

Class E r= 0.9888

Class F r= -0.4723

Step-by-step explanation:

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step-by-step explanation:

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.