Given:
The graph passes through the points (0,-20) and (4,10).
To find:
The equation of line that most closely represents the line depicted in the graph.
Solution:
If a line passing through two points, then the equation of line is
The given line passes through the points (0,-20) and (4,10). So, the equation of line is
Subtracting 20 from both sides, we get
The function form is
f of x equals fifteen halves times x minus 20.
Therefore, the correct option is B.