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3 years ago

Which is most likely the correlation coefficient for the set of data shown?

Mathematics

1 answer:

Sonja [21]3 years ago

8 0

The correlation coefficient of a scatter plot with line of best fit shown will be the slope of the line.

We can eliminate last 2 choices because the line is clearly a downward sloping line and it's slope wont be positive.

From the first two, it looks like the plot's slope is very close to -1. So we take -0.91, instead of -0.35. <em>[note: 0.91 is more steeper than 0.35 (which is very relaxed)]</em>

ANSWER: -0.91

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The function f(r) = π determines the area of a circle in cm2, A, in terms of the radius of the circle in cm, r. a. Write a funct

ollegr [7]

Answer with Step-by-step explanation:

We are given that

a. $f(r)=\pi r^2$

$A=\pi r^2$

$r^2=\frac{A}{\pi}$

$g(A)=r=\sqrt{\frac{A}{\pi}}$

b.Radius=2.58 cm

Substitute the values in the formula and $\pi=3.14$

$f(2.58)=3.14(2.58)^2=20.9 cm^2$

Hence, the area of circle =20.9 square cm

c.Area of circle=1530 square cm

$r=\sqrt{\frac{1530}{3.14}}=22.07 cm$

Hence, the radius of circle=22.07 cm

c.Area of circle of radius 15.2 cm= $A_1=3.14(15.2)^2=725.47 cm^2$

Area of circle of radius 15.1 cm= $A_2=3.14(15.1)^2=715.95 cm^2$

$A_1-A_2=725.47-715.95=9.52 cm^2$

Hence, the area of circle whose radius is 15.2 cm is greater than the area of circle of radius 15.1 cm by 9.52 square cm .

6 0

3 years ago

A circle is centered at CC-1, -3) and has a radius of 6.

lana [24]

Answer:

outside the circle i think

Step-by-step explanation:

4 0

3 years ago

HELP ME PLZZZZ ASAP!!!

inn [45]

Answer:

The answer is C) Mira, because each of the two points are $\frac{14}{8}$ units from 0

Step-by-step explanation:

<em>This is because:</em>

Absolute value cannot be negative. Absolute value is the distance a number is from 0. $\frac{14}{8}$ and $-\frac{14}{8}$ are still $\frac{14}{8}$ places away from 0.