A project is graded on a scale of 1 to 5. If the random variable, X, is the project grade, what is the mean of the probability d
2 answers:
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The given equation is:
To find the line perpendicular to it, we interchange coefficients and switch the signs of one coefficient.
The equation to a line perpendicular to it is:
$ 2y-x=c$
where, $c$ is some constant we have determine using the condition given.
It passes through $(2,-1)$
Put the point in our equation:
$2(-1)-(2)=c$
$c=-2-2$
$c=-4$
The final equation is:
$\boxed{ 2y-x=-4}$
The expression is telling you to proceed as follows:
- Pick some number
- Pick some number
- Compute the square of
- Multiply it by 4
- Subtract
from this result.
So, first of all, there's no point in fixing , because x doesn't appear in the expression. As for the evaluation, let's follow the aforementioned steps with fixed values:
- Pick
- Pick
- Compute
- Multiply it by 4:
- Subtract
from this result: