Which is NOT a function?
A. y - x = 6
B. y = 2x
C. x = -2
D. y + x =12
Please help. God bless you!!
all the choices are straight lines.
The only line which is NOT a function is a vertical line.
Which line is vertical ?
the x = -2 is a vertical line, or undefined slope... so that is the answer right?
Of course, you and I both said that.
To determine which of the given options is not a function, we need to understand the definition of a function. A function is a relation between two sets in which each input is associated with a unique output.
In option A, we have the equation y - x = 6. This equation represents a relation between x and y, where for each value of x, there is a unique value of y. Therefore, option A is a function.
In option B, we have the equation y = 2x. This equation also represents a relation between x and y, where for each value of x, there is a unique value of y. Therefore, option B is a function.
In option C, we have the equation x = -2. Unlike the previous options, this equation does not have both x and y variables. It only specifies a value for x (-2), without giving any information about y. Consequently, option C is not a function.
In option D, we have the equation y + x = 12. As with option A and B, this equation represents a relation between x and y, where for each value of x, there is a unique value of y. Therefore, option D is also a function.
So, the answer is option C.