Answer:
y = 4x − 1
Step-by-step explanation:
∵ A relation is called function if each input value has a different or unique output value,
In the line x = 1,
There are infinite output values for the input value of 1,
So, x = 1 is not a function,
In the relation {(3, 2), (3, –2), (4, 5), (4, –5)},
3 has two output values 2 and - 2,
Thus, {(3, 2), (3, –2), (4, 5), (4, –5)} is not a function,
In line y = 4x - 1,
For each value of x there is a different value of y,
So, y = 4x - 1 is a function,
In the circle, [tex]4x^2+y^2=16[/tex],
For 2 values of x there is one value of y,
eg : for x = 2 and x = -2,
y = 0,
So, [tex]4x^2+y^2=16[/tex] is not a function.
