SOLUTION: Point P is located at (3, 3) and Point Q is located at (1, 1). If Points P, Q and R are located on the same line and the x-coordinate of R is -2, what is the y-coordinate?

Algebra ->  Length-and-distance -> SOLUTION: Point P is located at (3, 3) and Point Q is located at (1, 1). If Points P, Q and R are located on the same line and the x-coordinate of R is -2, what is the y-coordinate?      Log On


   

Question 881226: Point P is located at (3, 3) and Point Q is located at (1, 1).
If Points P, Q and R are located on the same line and the x-coordinate of R is -2, what is the y-coordinate?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
Find equation of the line using its two known points.
Find y for x=-2.

y=%28%283-1%29%2F%283-1%29%29x%2B%281-%28%283-1%29%2F%283-1%29%29%2A1%29
Simplify that.
Let x=-2 and comptute y.

Answer by MathTherapy(10551) About Me  (Show Source):
You can put this solution on YOUR website!

Point P is located at (3, 3) and Point Q is located at (1, 1).
If Points P, Q and R are located on the same line and the x-coordinate of R is -2, what is the y-coordinate?


It's obvious that y+=+x, so if x = - 2, then highlight_green%28highlight_green%28y+=+-+2%29%29