Write in point-slope form an equation of the line that passes through the point (4, 4) with slope 3.

Here you go

y-4 = 3(x-4)

Point-slope formula;
y - y1 = m(x - x1)          slope(m) = 3,  (4, 4)

y - y1 = m(x - x1)
y - 4 = 3(x - 4)      << your answer

hope this helps, God bless!