Lodi solved the equation and justified each step as shown. identify lodi's error and fix his mistake.

Step-by-step explanation:

lodi's steps are fine but he mixed up the justifications for his steps:

the 2nd step's justification should be Subtraction Property of Equity; and

the 3rd steps's justification should be Multiplication Property of Equity.

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value