Which statements are true of functions? Check all that apply.
All functions have a dependent variable.
All functions have an independent variable.
The range of a function includes its domain.
A vertical line is an example of a functional relationship.
A horizontal line is an example of a functional relationship.
Each output value of a function can correspond to only one input value.
2 answers

yes
yes
no. consider y = 1/x^2
no  it fails the vertical line test
yes
no. consider y = 1/x^2

1.All functions have a dependent variable.
2. All functions have an independent variable.
3.A horizontal line is an example of a functional relationship.