Which equation represents a linear function?

Option D)

Step-by-step explanation:

General form of linear function :

Option A )

Since this function cannot be represented as general form of linear function.

Thus it is not a linear function.

Option B)

It is a quadratic function .

Option C)

Since this function cannot be represented as general form of linear function.

Thus it is not a linear function.

Option D)

Since it is represented in the general form of linear function.

So,   is a linear function.

1/4 and 8/3 because:

the reciprocal if 4 is 1/4 because 4 is used as 4/1 and the opposite of that is 1/4. the opposite of 3/8 is 8/3 so that is the answer.