SOLUTION: Beatriz thinks (1, -1) is a solution of y = 2x -1. Grace thinks it is not a solution. Who is correct? Explain your reasoning.

Algebra ->  Test -> SOLUTION: Beatriz thinks (1, -1) is a solution of y = 2x -1. Grace thinks it is not a solution. Who is correct? Explain your reasoning.      Log On


   

Question 585982: Beatriz thinks (1, -1) is a solution of y = 2x -1. Grace thinks it is not a solution. Who is correct? Explain your reasoning.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
If (1,-1) is a solution, then x = 1 and y = -1 should satisfy the equation. Let's see if it does.


y = 2x -1

-1 = 2(1) -1

-1 = 2 - 1

-1 = 1


Since the equation is false, x = 1 and y = -1 do NOT satisfy the equation.

Therefore, (1,-1) is NOT a solution.
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