This is the number of parts out of 100, the numerator of fraction where the denominator is 100

Question #1:

a)

(4, 2)

Both of these are positive, and when x and y are both positive they're both in Quadrant 1.

b)

(x + 1, y - 5)

Add 1 to 'x', subtract 5 from 'y':

(4 + 1, 2 - 5)

(5, -3)

x is positive and y is negative, that means this will be in Quadrant 4.

c)

Reflection Across y-axis:

(-x, y)

Multiply -1 to 'x':

(5 * -1, -3)

(-5, -3)

Both of these are negative, if both x and y are negative it's located in Quadrant 3.

Question #2:

No, that can't tessellate a plane. We can't cover up space so there are no overlaps or gaps.