we know that
If two lines are parallel, then their slopes are the same
we have the equation of the line y=9x-1
the slope of this line is m=9
so
the slope of the parallel line is too m=9
the equation of the line in slope intercept form is equal yo
y=mx+b
the equation of the line in point-slope form is equal to
y-y1=m(x-x1)
we have
m=9
(x1,y1)=(-2,3)
substitute in the equation
y-3=9(x-(-2))
y-3=9(x+2)
Multiply right side
y-3=9x+18
convert to slope intercept form
isolate the variable y
y=9x+18+3
y=9x+21
this is the equation of the line in slope intercept form