Answer:
a. y = 2x + 1: Not from x to y
b.1 = 2y – 4x: Not from x to y
c. y^2 – 1 = x: This is a function from x to y
Step-by-step explanation:
We are to determine whether or not the equations are function from x to y
Given the function y = f(x)
y is a dependent variable while the input variable is an independent variable. So we can say y is a function from y to x.
Also x = f(y) can be expressed as equation of a function from x to y i.e x is dependent and the input variable is independent
From tthe following options, the equation that is a function from x to y is
y² – 1 = x
This can also be written as x = y² – 1 where f(y) is y² – 1
The rest are not a function of x to y but otherwise unless re-written
