Got this graph, and i'm asked to sort in increasing order $a_i$, (form of the function is the usual linear function: $f_i=a_ix+b_i$i also have to know if there are repeated values in $a_i$ and $b_i$, i suppouse there are repeated values in $b_i$ because $f_1, f_4$ intersect in the same spot in the Y axis. How the fuck do i know if $a_i$ has repeated values? i suppouse that the only two cases i could contemplate as repeated are $f_1, f_4$ because they have a positive inclination, but anyways, how the fuck do i do this crap?