Question 636427
Equation of the line slope-intercept form
y=mx+b 
Given
Equation of the Given line
y=6
Compare with the equation of line slope-intercept form
Slope of the given = m = 0
Since lines are parallel their slope will be same 
Slope of the required line = m = 0
Point (5, 7)
We have a point and slope we can get easily the require line equation. 
Use Equation of the line point-slope form
m = y2-y1/x2-x1
Put the values in above equation, we have
m=(y-2)/(x-5)
0(x-5)=(y-7)
0=y-7
y=7
Above equation is the equation of the required line


Graph
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y=6
y=7
{{{ graph(500,500,-10,10,-10,10,0x+6,0x+7) }}}