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

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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)   (Show Source): You can put this solution on YOUR website!
y = -x + 18

Slope is -1

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