Question

which situation has a quantity that changes at a constant rate over time?
the speed of a city bus over time as it travels to multiple stops
the distance from the ground of a moving swing over time
the total amount of flour used for different numbers of batches of bread
the number of views of a viral video at the end of each day

Explanation:

• Analyze each option:
• A city bus speeds up/slows at stops, so speed isn’t constant.
• A swing’s height follows a periodic (non - constant rate) motion.
• For bread batches, if each batch uses a fixed flour amount, total flour (y) = (flour per batch)×(number of batches, x), so rate (slope) is constant.
• Viral video views grow exponentially (rate increases), not constant.

Answer:

the total amount of flour used for different numbers of batches of bread