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Linear functions are those whose graph is a straight line. A linear function has the following form. y = f(x) = a + bx. A linear function has one independent variable and one dependent variable. ... It is also known as the slope and gives the rate of change of the dependent variable.
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Answer: 4x + y = 0

Step-by-step explanation: To determine whether the function 4x + y = 0 is linear, quadratic, or neither, let's first set the function equal to y by subtracting 4x from both sides to get y = -4x or y = -4x + 0.

Now, we can see y = -4x + 0 is in the form y = mx + b.

When a function is written in the form y = mx + b, we know that it's a linear function.

Another way to tell that it's a linear function is that the x in the function is raised to the first power.