Question 369055
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Hi,
1) line passing through (7,y) and (1,0)parallel to linethe joining (4,4) and (-2,1). 
{{{m =(y[2] - y[1])/(x[2] - x[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) {{{y - y[1] = m(x - x[1])}}}
Slope m = 2 passing through(7,4))
y - 4 = 2(x - 7)
y - 4 = 2x - 14
y = 2x -10