Answer:
0.783
Step-by-step explanation:
To find first r and then r square for the data
correlation coefficient of x and y = Cov (x,y)/std dev x * std dev Y
Cov (x,y) = E(xy) -E(x)E(y)
Hence calculations would be as follows:
x y xy
1 2 2
2 10 20
5 5 25
7 18 126
10 25 250
Mean 5 12 84.6
Cov E(xy)-E(x)E(y) 24.6
r 0.884640297
r^2 0.782588454
so answre is 0.783 after rounding off.
Answer:
Point D
Step-by-step explanation:
First set it up so that -x-5=1
Then solve for X
-x=6
Divide by negative 1 since we cannot have a negative x
x=6
Answer: expression
Step-by-step explanation: An equation is a mathematical sentence that contains an equal sign. Since this problem contains no equal sign at all, it can't be an equation so it's considered an expression.
Answer:
HI
Step-by-step explanation:
The two orange squares means one whole. Two orange squares means two.
The empty one means it 0
and the last one is divided by 10 lines. Since it's a square, it means it would be 10 down and 10 across.
Since two of the lines are orange it means 2/10.
And since we know that the square it 10x10. One square would be 1/100 because 10x10 = 100
Im not sure about the black squares, but I bet it's either decimal or not a full square.
If not a full square then that means that the box has 7 and .4 lines. Because on the last bit, there are 4 squares left.
If a decimal, then,
it would be 26 of black squares, which would lead you to: 202.1. I think :3