Which of these functions is a linear function? y + x = 5 y + x2 = -2 y = 2x3 + 1 3x2 + y2 = -4

First Option

Step-by-step explanation:

The linear functions have the following form

Where a and b are constants and are real numbers and the exponent n and m is always equal to 1.

In other words, the linear equations have the form

Identify among the options the functions that have this form

is a linear function with , ,  and  

is not a linear function because .

is not a linear function because

is not a linear function because and

y + x = 5

Step-by-step explanation:

The graph of is a straight line

The graph of is a parabola.

The graph of is a non-linear curve.

The graph of

is an ellipse.

A graph of a linear function  is a straight line.

Therefore y + x = 5 is the correct choice.

this is a very good question

step-by-step explanation:

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