Answer: Every box has the number 7 inside
The equation y = 7 at the top means that y is 7 no matter what x is
There are no x variables in the given equation, so x does not affect the value of y.
The equation y = 7 is the same as y = 0x+7. Note how plugging in any x value leads to the 0x term being 0, and adding 0 to anything doesn't change that value.
The graph of y = 7 or y = 0x+7 is a flat horizontal line through 7 on the y axis. Two points on this line are (0,7) and (1,7). Every point on this line has a y coordinate of 7.