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# help me

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What is the slope of a line perpendicular to the line whose equation is $$\frac{x}{4} - \frac{y}{5}=1$$? Express your answer as a common fraction.

Jan 27, 2020

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x/4 - y/5 =1

Put it into y= mx + b form     slope will be  'm'   perpindicular slope is  - 1/m

y/5 = x/4 -1

y =  5/4 x - 5       slope is    5/4      perpindicular   is  -1/(5/4)   = - 4/5

Jan 27, 2020