Is the following equation linear? If the equation is linear, convert it to standard form (ax+by=c) 9x^2-(3x+1)^2=y-
*at least help w steps on if linear or not, please :) if is why/how if not same lol!
Brainlest and thanks!
Many thanks!

Mallory has been offers two different jobs. she can baby sit for 6 hours a week and get $8.50 an hour. or she can work at the library for 14 hours a week and make $5.50 an hour. which job will allow her to save the most money after 6weeks?