Which equation has (2,-1) as a solution.
Y=2x - 1••
Y=x + 3
Y=x - 3
Y=-2x+1
Check my answer
answer is c
Disagree.
trying your choice:
for (2,-1) in y = 2x - 1
-1 = 2(2) - 1
-1 = 3 ????
not every likely.
try the others the same way.
No, did you try the other alternatives?
-1 = 2(-2) + 1 = -3
Anonymous is right guys
To check if (2,-1) is a solution to an equation, you need to substitute the x and y values into the equation and see if it holds true.
Let's substitute x = 2 and y = -1 into each of the given equations:
1. Y = 2x - 1:
Substitute x = 2 and y = -1
-1 = 2(2) - 1
-1 = 3
Since -1 is not equal to 3, (2,-1) is not a solution to this equation.
2. Y = x + 3:
Substitute x = 2 and y = -1
-1 = 2 + 3
-1 = 5
Since -1 is not equal to 5, (2,-1) is not a solution to this equation either.
3. Y = x - 3:
Substitute x = 2 and y = -1
-1 = 2 - 3
-1 = -1
Since -1 is equal to -1, (2,-1) is a solution to this equation.
4. Y = -2x + 1:
Substitute x = 2 and y = -1
-1 = -2(2) + 1
-1 = -3 + 1
-1 = -2
Since -1 is equal to -2, (2,-1) is also a solution to this equation.
By checking the answers, we can see that the equation "Y = x - 3" and "Y = -2x + 1" both have (2,-1) as a solution. So, your answer is correct.