Question

Which equation is a linear function?
y=2^x -1
y=x/2-5
y=2/x +3
y=x^2 +7

Answer 1

Second Choice.

Explanation:

`y = mx + b`

That is the linear function. Any coefficients with higher degrees won't be considered as a linear function.

So we can cut out the first and last choice.

Then we have only two choices which are

`y = (x)/(2) - 5 \\ y = (2)/(x) + 3`

The second equation is called Rational Function where a variable is a denominator.

Therefore, the correct answer is second choice.