Answer:
C & D
Explanation:
The key formula will be y = mx + b
y = the function
m = slope
b = y - intercept
Another term for slope is rate of change
They asked for negative rare of change, so negative slope, which takes it to
y = -mx + b
The only two that work are C & D because C shows -4x and D shows -2x, both negative.
A & B are 7x and 2/3x, both positive.