SOLUTION: Architects often use the equation x + y=18 to determine the height y, in inches, of the riser of a step when the tread is x inches wide. Express the slope of stairs designed with t

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: Architects often use the equation x + y=18 to determine the height y, in inches, of the riser of a step when the tread is x inches wide. Express the slope of stairs designed with t      Log On


   

Question 442864: Architects often use the equation x + y=18 to determine the height y, in inches, of the riser of a step when the tread is x inches wide. Express the slope of stairs designed with this equation without using the variable y.

Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
x is the independent variable, so



The slope is -1.