Tell whether the equation is a function:

1) y = x-3 ;
2) y = -3/4x ;
3) x = -11 ;
4) x = 8 ;
5) y = 2(x+1)

3 and 4 are not functions, as there is only one variable

In all the others, y is a function of x

Thank you

To determine whether an equation is a function, we need to look at the relationship between the x-values and the y-values.

1) y = x-3: This equation is a function because for every value of x, there is one unique value of y determined by substituting that x-value into the equation.

2) y = -3/4x: This equation is a function because, similar to the previous equation, for every value of x, there is one corresponding value of y based on the substitution.

3) x = -11: This equation is not a function because there is only one fixed x-value (-11) and an infinite number of possible y-values. In other words, multiple y-values correspond to the same x-value.

4) x = 8: Similar to the previous equation, this equation is also not a function because there is only one fixed x-value and multiple possible y-values.

5) y = 2(x+1): This equation is a function because, once again, for every value of x, there is one unique value of y determined by substituting that x-value into the equation.

In summary, equations 1, 2, and 5 are functions while equations 3 and 4 are not functions.