Find the equation of the altitude to side BC of triangle ABC is A is (3,2), B is (6.0) and C is (1,-1)?

Question

What does altitude mean? And does anyone know how to solve problems like these?

Answer 1

must be perpindicular to BC
slope of BC is (0-(-1)/(6-1)=1/5
slope of altityde is -5
y=-5x+b & it imcludes point 3,2
2=-5*3+b
2=-15+b
b=17
the equation is y=-5c+17