A linear model always represents a straight line which is x + y = c. Then the correct option is A.
A Linear system is a system in which the degree of the variable in the equation is one. It may contain one, two, or more than two variables.
A linear model is given as
x + y = c
In the linear model, the power of the variable is one and the equation represents on the graph as a line.
More about the linear system link is given below.
https://brainly.com/question/20379472
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