According to the equation (y=12x) Philip earns 12$ per hour. In order to compare this value to Fiona earnings we must find the slope of the line which represents the information in the table.
Finding the slope with the slope formula and the points (3,42) and (5,70), we have:
[tex]m=\frac{y2-y1}{x2-x1}=\frac{70-42}{5-3}=\frac{28}{2}=14[/tex]Fiona earns 14$ per hour, so she earns 2$ per hour more than Philip.
The answer is the option A.
