Answer:
y=-2x+1
Step-by-step explanation:
Two variables x and y are said to be negatively correlated if:
y=mx+c and m is negative
Here, y = -2x + 1
m=-2
Hence, x and y are negatively correlated
y=1/2x+1
m=1/2
Hence, x and y are not negatively correlated
y = 2x - 1
m=2
Hence, x and y are not negatively correlated
Hence, correct answer is:
y=-2x+1
