To find : which of the given graphs is a function and which of the functions are one to one.
The answer is a) Not a Function, b) Function, c) Function and one to one and d) Not a Function.
Given information : The graphs of each option is given.
A curve in the coordinate plane is the graph of a function if and only if no vertical line intersect the curve more than once. This condition is not met with options a and d. So a and d are not a function.
Option B and Option C are function, and option c is one to one because for no two values of x, we have same value of y.
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