find an equation for the line perpendicular to the line 4x+9y=4 having the same y-intercept  9x+5y=5
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the perpendicular line will have slope(m) that is reciprocal and opposite to the slope (M) of line 4x+9y=4.

y= -4/9x + 4  

M= -4/9

m=9/4=2.25

y-intercept of 9x+5y=5 is 1. (y=-9/5x + 1)

So, the answer is: y=2.25x+1

by Level 8 User (35.3k points)

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