Use the graph to write a linear function that relates to .
Step 1: Finding the slope of line from the graph.
From the graph we have points and .
We know, slope of the line,
Now using two points and
Here, and
Now putting the values we get,
Step 2: Finding the linear function that relates to .
We know, linear equation of a line is
(Putting and i.e., )
Now again put in linear equation,
Hence, linear function is .