Which of the following equations could be the trend line of variables that have a negative correlation?

y = -2x + 1
y=1/2x+1
y = 2x - 1

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

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step-by-step explanation: