2/04 Exercise 4.18 Jaa Sulje Kirjaudu sisään lähettääksesi tämän lomakkeen Say whether each of the following equations give a straight line or not. Give a reason for each answer. a) [[$ y = x + 6 $]] This equation is isn't a line, because b) [[$ 3y = 3 x \: – 4 $]] This equation is isn't a line, because c) [[$ y = 2x^2 + 4x $]] This equation is isn't a line, because d) [[$ y = x^2 + y^2 $]] This equation is isn't a line, because e) [[$ y = 4 \: – x = 5 + 2y $]] This equation is isn't a line, because f) [[$ \displaystyle\frac {x} {3} + \displaystyle\frac {y} {3} = 2 $]] This equation is isn't a line, because g) [[$ \displaystyle\frac {3} {x} + \displaystyle\frac {3} {y} = 2 $]] This equation is isn't a line, because Kirjaudu sisään lähettääksesi tämän lomakkeen