SOLUTION: A straight line, l, passes through P=(9p, 10p) and Q=(p, -6p). For a point R= (x,y) which lies on line l, as the value of x decreases by 2, what happens to the value of y?
Does
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Question 1047715: A straight line, l, passes through P=(9p, 10p) and Q=(p, -6p). For a point R= (x,y) which lies on line l, as the value of x decreases by 2, what happens to the value of y?
Does it increase, or decrease? and what is the amount of change?
Thanks
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Use the slope formula to find the slope of line 
using the coordinates of points P and Q.
where )
and )
are the coordinates of the given points.
If the slope is positive, 
increases as 
increases.
Use the Point-Slope form of an equation of a line to write the equation of line .
 )
where are the coordinates of one of the given points and 
is the calculated slope.
John
My calculator said it, I believe it, that settles it
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