For each question, decide whether or not it is a function. PLEASE HELP ASAP ALEKES ALGEBRA 2 MATH ILL GIVE BRAINLIEST

Your answers are right because the x's can not repeat
so 1.it is a function
2.it is a function
3.it is not a function bc "d" and "m" both repeat 2 times
4.it is not a function bc 2 repeats 2 times
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