6 Which expression can be classified as linear?
(A) x2+ x-4 (6) 3x2 - 1
(C) 6x - (D)+7

Step-by-step explanation:

A linear expression has the highest power of the variable to 1, i.e ax+b

So, in this case the questions is not well presented

But looking at options C.

6x

This is linear expression when compare to ax+b, but b=0

Looking at option D

7

This is also a constant and it is linear.

But the best answer is C because it is an expression that has variable x and it is function of x.

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step-by-step explanation: