Answer:
Simplifying the equation:
Grouping like terms:
⇒
Solving for 'x', we have:
⇒
Answer:
Step-by-step explanation:
Answer:
And the difference is given by:
Step-by-step explanation
We assume that th data is this one:
x: 242-255 -227-251-262-207-140
y: 91- 81 -91 - 92 - 102 - 94 - 91
Find the least-squares line appropriate for this data.
For this case we need to calculate the slope with the following formula:
Where:
So we can find the sums like this:
With these we can find the sums:
And the slope would be:
Now we can find the means for x and y like this:
And we can find the intercept using this:
So the line would be given by:
The prediction for 253 seconds is:
And the difference is given by:
Step-by-step explanation:
8 /3 c - 2 = 2/3 c - 12
Put all the one u want to solve to one side
8 /3 c - 2 = 2/3 c - 12
8/3c - 2/3c = 2-12
6/3c = - 10
Now multiply 3c to both sides
6 = - 30c
c = 6/ - 30
= 1 / - 5
= 1
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5