If I’m understanding this correctly, the equation itself is 12=3x.
You will need to divide 12 by 3 to get 4. So the answer is 4
Answer:
Linear function
Step-by-step explanation:
x y Ist difference
-6 -27 -
-5 -21 -21 - (-27) = 6
-4 -15 -15 - (-21) = 6
-3 -9 -9 - (-15) = 6
-2 -3 -3 - (-9) = 6
Since, Ist difference is common in the given table,
(Common difference = 6)
It's a linear function.
So the mean is 72.97
We need to subtract the mean from each value and square it.
(65-72.97)^2= 63.5209
(68-72.97)^2=24.7009
(69-72.97)^2=15.7609
(70-72.97)^2=8.8209
(71-72.97)^2= 3.8809
(72-72.97)^2=0.9409
(90-72.97)^2=290.0209
(95-72.97)^2=485.3209
Now we add up the new values ( also consider their frequency) and find their mean.
Add the values
63.5209+(2 •24.7009=49.4018)+(5•15.7609=78.8045)+(8•8.8209=70.5672)+(7•3.8809=27.1663)+(3•0.9409=2.8227)+(2•290.0209=580.0418)+(2•485.3209=970.6418)= 1,842.967
Divide by total numburs to find the mean
1,842.967/ 30=61.43223333
The standar deviation is the square root of the mean so is
Square root of 61.43223333=7.837871735
Round to the nearest tenth
Standard Deviation is 7.8
Answer:
-65 i suppose
Step-by-step explanation:
