Question 394081: Find the value of R so that the line through (8,r) and (4,5) has a slope of -4.
Answer by solver91311(24713)   (Show Source):
You can put this solution on YOUR website!
It is possible to find the value of R so that the line through (8,R) and (4,5) has a slope of -4. And it is possible to find the value of r so that the line through (8,r) and (4,5) has a slope of -4. But it is not possible to find the value of R so that the line through (8,r) and (4,5) has a slope of -4 without some indication of a relationship between the value of R and the value of r. Yes, R and r are two different things, and no, I do not "know what you meant" even though I know what you meant.
Use the slope formula.
where ) and ) are the coordinates of the given points.
So, solve the equation:
or
depending on which variable tickles your fancy.
John
My calculator said it, I believe it, that settles it
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