Question

A watering can dispenses water at a rate of 0.40 gallon per minute. The original volume of water in the can was 10 gallons. Which set of ordered pairs shows the volume of water in the can in gallons (y) as a function of time in minutes (x) from the first minute after the can starts dispensing water?
{(10, 1), (9.60, 2), (9.20, 3)}
{(1, 10), (2, 9.60), (3, 9.20)}
{(9.60, 1), (9.20, 2), (8.80, 3)}
{(1, 9.60), (2, 9.20), (3, 8.80)}

Answer 1

The correct answer is B

Answer 2

Answer:

The ordered pairs that shows the volume of water in the can in gallons (y) as a function of time in minutes (x) from the first minute after the can starts dispensing water is:

• {(1, 9.60), (2, 9.20), (3, 8.80)}

Explanation:

You should know that whenever numerical values are expressed that would be represented on a number line, the X-axis variables are located first and then the Y-axis values separated by a comma, so the first represented values should be the minutes.

The information provided in the statement identifies that at minute 0 the volume of the shower is 10 gallons, which would be represented as (0.10), but since it starts from minute 1, 0.4 gallons must be withdrawn, which is the volume removed minute by minute, which would obtain the set provided in the fourth option.