Answer:
2y+1+9x is written as a product of three factors
Let the side length of the square be x, then A = x^2
but diagonal (z) = sqrt(2x^2)
z^2 = 2x^2
x^2 = 1/2 z^2
Thus, A = 1/2 z^2
dA/dz = 1/2 (2z) = z
The rate of change is z.
When z = 4, the rate is 4.
Answer:
1/3 is the slope and if it’s less than or greater to that, then the bottom half of the graph is shaded in.