Answer:
c=2.75f+150
Step-by-step explanation:
The total installation cost follows the general equation y=mx+c where m is the gradient and c is the y-intercept. Normally, the y-intercept is when x=0 hence at this point, before doing the work, the installation cost is fixed as $150. This becomes our y intercept. Considering that the cost of tiling depends on the area, then the larger tge area, the larger the cost and visa vis. Therefore, for f square foot, the cost of tiles will be 2.75f.
The equation of total cost can be represented by
c=2.75f+150