Question 172523
1)4y+4x+9=12+4x---> combine like terms
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4y=3
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y=3/4.......so line is horizontal....meaning slope is {{{highlight(0)}}}  take any two points on the line to show this (1,3/4), (2,3/4) m= (3/4)-(3/4)/2-1=0/1=0
y intercept is {{{highlight(3/4)}}}
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2)slope is change in y over change in x  points (8,10) and (9,-8)
{{{highlight(m=(-8-10)/(9-8)=-9/1=-9)}}}
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3)any parallel lines have equal slopes.....so first we need to write our equation in y=mx+b format to find the slope.  2x=7y+5--->7y=2x-5-->y=(2/7)x-5/7
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so m=2/7....so again a line parallel will have this same slope
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(-7,8) is our point......using the point slope formula we get
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y-8=(2/7)(x-(-7))
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y-8=(2/7)x+2
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{{{highlight(y=(2/7)x+10)}}}