Determine whether the relations represent y as a function of x.

Both of those are functions.

Step-by-step explanation:

is a parabola that opens up.

Any upward or downward parabola is a function because they pass the vertical line test.

Subtract 1 on both sides:

Multiply both sides by -1:

So this is a another parabola and it is faced down.  So this is also a function.

wit willl always be a parabola.  

If then it is open up.

If then it is open down.

Upwards and downward parabolas will always be functions.

are also parabolas but these open to the left or right.  These will not be functions because they will not pass the vertical line test.  

81 seats

step-by-step explanation:

if you multiply 0.65 times 125 then you get 81.5 seats. well since you can't have half of a seat you have to round down and get 81 seats in the no children zones. that leave 44 seats outside of the no children zone.