Help me pretty pls explain ur answers pls

The transitive property of equality states that: o if a = b, then bra o if a = b, then ac = bc o if a = b and b= c, then a = if a = b and c= c, then a + b = b + c

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Define multiplicative inverse. give an example of a number and its multiplicative inverse.