Answer:
Google copy and paste ;D...
The most important reason a couple gets engaged has traditionally been to prepare for marriage. An engagement changes the status of a couple and demonstrates their commitment not just to each other, but also to a change of lifestyle.
No, its not. In a function, each x value has only one corresponding y value. In this relation, the x value 3 has corresponding values of both -1 and 5, which means it cant be a function.
5x-y=7
-y=-5x+7
y=5x-7
f(x)=5x-7
ALL OF THE ABOVE! All include human activity
