question 22 : a
because when you plug in x=2, eliminate b and c they Re points then plug in y=1 eliminae d because its a point
question 23:c
the 2 doted lines are y=2 and x=2.5 and the latter is not an option
question 24:c
plug in x=4 then y=1 initially
to choose the answer plug x=7 and option c gives y=1