Question

What is true of the function g(x) = –2x2 + 5?

g(x) is the multiplication of g and x.
–2x2 +5 is the input of the function.
The variable x represents the independent variable.
The variable g represents the input of the function.

Answer 1

Only statement 3 is true.

- 1 is false: g(x) is function notation (value of g at x), not g times x.
- 2 is false: −2x^2 + 5 is the output (the rule/definition of the function), not the input.
- 3 is true: x is the independent variable (the input).
- 4 is false: g is the name of the function, not the input.