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

Algebra ->  Finance -> 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       Log On


   



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) About Me  (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