Question

Does the point (-2,-9) satisfy the equation y = 2x - 5

Answer 1

First, substitute.

-9 = 2(-2) - 5
-9 = -4 -5
-9 = -9
Yes, the point (-2, -9) satisfies the equation

Answer 2

$y = 2x - 5 \\ - 9 = 2( - 2) - 5 \\ - 9 = - 4 - 5 \\ - 9 = - 9$
Since, both sides of the equation equal each other, that means it does satisfy this specific equation.