Question

Among the following, the graph of the equation may not a straight line is [ ]

a) ax + by + c = 0, (a is not equal to 0 and b is not equal to 0) b) ax + by + c = 0

c) ax + by + c = 0 , (b is not equal to 0) d) ax + by + c = 0 , (c is not equal to 0)​

Answer 1

Linear equation for a straight line

The graph may not be a straight line when ax + by + c = 0 , (c is not equal to 0)​.

Explanation

The equation of line has 1 or 2 variables i.e., x or y. So, a line cannot be represented when a or b is zero. If both of them are zero we $c=0$ this is not a linear equation. Either a or b has to have some value.

So, d) ax + by + c = 0 , (c is not equal to 0)​ may result in the line not being a straight line.

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