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 the stairs designed with

Algebra ->  Graphs -> 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 the stairs designed with      Log On


   

Question 556525: 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 the stairs designed with this equation without using the variable y.
Please help me on this.
Thank you
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
y = -x + 18

Slope is -1