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10

Step-by-step explanation:

Hope it helps!

The constant rate of proportionality is 10.

Step-by-step explanation:

The formula for constant rate of proportionality is y divided by x.

So, we would then solve the quotient of each y and x.

The first one would be 30 divided by 3, which is 10.

The second one would be 100 divided by 10, which is also 10.

The third and final one would be 160 divided by 16, which is also 10.

Hence, the constant rate of proportionality would be 10.

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

how am i supposed to answer

step-by-step explanation: