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The linear equations are , , and .

Step-by-step explanation:

Given: The equations are , , , and .

To find: The linear function from the given equations.

The equation for a linear function is where

m = the slope,

x = the input variable,

c = y - intercept.

Consider the equation .

This equation is of the form . So, this is a linear function.

Now, consider the equation .

This can be written as . Further this can be written as .

Clearly, this equation is also of the form .

Therefore, is a linear equation.

Next equation is .

This equation has only one variable . This cannot be written as .

So, is not a linear equation.

Consider next equation .

This can be written in the form of as .

So, is a liner equation.

Now, the last equation is .

This can be written as which is of the form .

So, equation is a linear equation.

Hence, the linear equations are , , and .

the 2 figures are congruent bc if you reflect abcd over the y axis then over the d axis the figures overlap