The graph represents a functional relationship.

Question

On a coordinate plane, a straight line with a negative slope begins at point (1, 3), crosses the x-axis at (4, 0), and exits the plane at (18, negative 14).

Which value is an input of the function?

–14
–2
0
4

Answer 1

In the context of a function, the input values are typically the x-values from the graph of the function.

The graph you've described is a straight line that exits the plane at (18, -14) after crossing the x-axis at (4, 0). The x-values (inputs) in this case include:

• The x-coordinate at the x-axis crossing (4)
• The first point of the line (1)
• The last point on the line (18)

Among the given options (–14, –2, 0, 4), the value that represents an input of the function is 4, as it corresponds to the x-coordinate where the line crosses the x-axis.