Answer:
The cost for 58 minutes is $14.74
Step-by-step explanation:
Assuming that the graph of cost versus time varies linearly,
the given 2 coordinates are <em>(45,13.31) and (74,16.50).</em>
Let the cost for 58 minutes be<em> "y".</em>
The third coordinate is (58, y) , which lies on the line joining the above 2 points.
The slope of the line is
m =
m = 0.11
The equation of line is,
Inserting third point in above equation, we get,
Thus, the cost for 58 minutes is $14.74