Question

what is the equation of a line that passes through the point (0, 5) and has a slope of 1/3

Answer 1

y - y1 = m (x - x1)

y1 being the y coordinate
x1 being the x coordinate
m being the gradient (or slope)

y - 5 = 1/3 (x - 0)
y - 5 = 1/3x
y = 1/3x + 5