Find, in gradient-intercept form, the equation of the line which has:
(a) gradient 3 and passes through (4,1)
(b) gradient −2 and passes through (−3,5)
(c) gradient 41 and passes through (4,−3)
(d) gradient −32 and passes through (−2,−7)
(e) gradient 2 and y -intercept −9
(f) gradient −43 and y -intercept 4.