Answer:
No, the pair is not a solution to the equation.
Step-by-step explanation:
For the pair to be a solution to the equation, x = -2 must lead to y = 8, o =r vice versa. This leads to being able to solve it two ways either through x or through y.
I'll solve it through x:
y = -2x - 1
with x = -2
y = -2 * - 2 - 1
y = 4 - 1
y = 3
Since y = 3, when x = -2 the pair (-2,8) is not a pair to the solution of the equation.
PS: You can double check by solving through y and you'll find x = -4.5
