Which equation has (2, -1) as a solution?
a. y = 2x - 1
b. y = x + 3*
c. y = x - 3
d. y = -2x +1
check my answer plz
check for b)
LS = -1
RS = 2+3 ≠ -1 , so not b)
check for c)
LS = -1
RS = x-3 = 2-3 = -1 = LS
looks like c)
To check which equation has (2, -1) as a solution, substitute the values x = 2 and y = -1 into each equation and see which one satisfies the equation.
a. y = 2x - 1
Substituting x = 2 and y = -1:
-1 = 2(2) - 1
-1 = 4 - 1
-1 = 3
This does not hold true.
b. y = x + 3
Substituting x = 2 and y = -1:
-1 = 2 + 3
-1 = 5
This does not hold true.
c. y = x - 3
Substituting x = 2 and y = -1:
-1 = 2 - 3
-1 = -1
This holds true.
d. y = -2x + 1
Substituting x = 2 and y = -1:
-1 = -2(2) + 1
-1 = -4 + 1
-1 = -3
This does not hold true.
Therefore, the equation y = x - 3 is the correct equation with (2, -1) as a solution.
Your answer (b) is incorrect. The correct answer is (c) y = x - 3.