Which of the following examples have a constant rate of change? You are making meatballs and roll out 30 meatballs then in a half hour and then another 30 meatballs in the next 20 minutes.

An electrician earns $50 the first hour plus $35 for every additional hour.

The number of bacteria triples every hour.

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B/second option

Step-by-step explanation:

The first option is wrong because you make 30 meatballs in 30 mins but then 30 meatballs in 20 mins. If it was constant then in 20 mins you make less meatballs.

The last option is wrong because if bacteria triples, then that is exponential, not constant change.

Only the middle option makes sense. The rate of change is $35 for each hour!

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6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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