Hi,

1) line passing through (7,y) and (1,0)parallel to linethe joining (4,4) and (-2,1). 



(4,4) and (-2,1)

m = (1-4)/(-2-4) = -3/-6 = 1/2

line passing through (7,y) and (1,0) with slope = 1/2

Note: x increased by 6, therefore y must increase by 3 (1/2 = 3/6)

y = 3



2) 

Slope m = 2 passing through(7,4))

y - 4 = 2(x - 7)

y - 4 = 2x - 14

y = 2x -10 

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