## Precalculus: Mathematics for Calculus, 7th Edition

(i) Linear equation $$Ax+By=C$$ (ii) Quadratic equation $$f(x)=Ax^{2}+Bx+C$$
(i) Linear equation $$Ax+By=C$$ (ii) Quadratic equation $$f(x)=Ax^{2}+Bx+C$$