Answer:
• y=0.03x+50
,
• $185
Step-by-step explanation:
The slope-intercept form of the equation of a line is:
The number of square feet = x
The cost of cleaning x square feet = y
From the given information:
• When x=2500 square foot, y=$125; and
,
• When x=3200 square foot, y=$146
First, we find the slope of the line.
Next, substitute the value of m.
The slope-intercept form representing the total cost, y, to clean a house with x square feet is:
(b) When the house is 4500 square feet.