Please help me! I know I am not showing my work but I don't even know how to solve these! Please help me!

Tell whether the given equation has the ordered pair as a solution.

1. y = 6x; (3,16)
2. y = -4x; (-2,8)
3. y = x - 3/4; (2,1 1/4)

PLease help me understand how to do these type of questions!