Answer:
True
Explanation:
A linear equatin in the xy plane contains two variables x and y and the power of both x and y should always be 1
The std form of a linear equation is
ax+by+c =0
Let us prove that this repesents a straight line only.
Consider the equation ax+by+c=0
Differentiate wrt x
a + b y' =0
Or y' = -b/a
In other words the slope of the curve is not dependent on the points taken but constant.
This ensures constant variation of y over x.
Hence this is nothing but a straight line in xy plane.