Respuesta :

It helps to know the definition of a linear function,  which is just a straight line, like y=x

So, isolate 3y which means
3y=4x+20
Divide by 3 on both sides and you have
y=4x/3 + 20/3
If you graph it, the function gives a straight line, so therefore it is a linear function.

The slope is constant for the given function thus it will be a linear function.

What is a linear function?

A straight line on the coordinate plane is represented by a linear function.

The formula for a linear function is f(x) = ax + b, where a and b are real values.

A linear function always has the same and constant slope.

Given the function

3y - 4x = 20

3y = 20 + 4x

y = (4/3)x + (20/3)

The general equation of linear function is

y = mx + c , where m is the slope.

By comparing both

Slope = 4/3 which is a constant.

Since the slope of the line is constant hence given line will be a linear function.

For more about the linear function

brainly.com/question/21107621

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