Question 543151
Remember, y=mx+b, where m=slope. So all you need to do is solve for y.
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{{{5y=160+9x}}}
Divide by 5: {{{y=32+(9/5)x}}}
So {{{y=(9/5)x+32}}}, and therefore {{{m=9/5}}}
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also {{{5x=90-9y}}}
Add 9y to each side: {{{5x+9y=90}}}
Subtract 5x from each side: {{{9y=-5x+90}}}
Divide by 9: {{{y=(-5/9)x+10}}}
Therefore, {{{m=-5/9}}}