Factorise x² – 14x + 48

A line has equation . At what point does this line intersect the y-axis?

Given that f(x) = x + 3 and g(x) = x², find gf(x)

Line A is shown on the grid below. Find the equation of this line:

Line B is parallel to line A and passes through the point (9,20). Find the equation of line B.