Question

If the relationship between the total cost, y, of buying the materials and renting the tools at Store C and the number of days, x, for which the tools are rented is graphed in the xy-plane, what does the slope of the line represent?

• A. The total cost of the project
• B. The total cost of the materials
• C. The total daily cost of the project
• D. The total daily rental costs of the tools

Answer 1

Answer: (D)

The total daily rental costs of the tools

Given function or line

$y=M+(W+K)x$

for store C

$y=700+(20+70)x$

$y=90x+700$

On comparing above eq with $y=mx+c$ where m is the slope

Hence slope of above line $m=90$

The slope of the line represents that for every single 1 day the value of y i.e. rental cost will increase by 90 Hence the total daily rental costs of tools is 90