Can anyone help? Writing the equation connecting volume V and time t

[IslaIng]

Q3 A bath contains 150 liters of water. Water is drained from the bath at a steady rate of 30 liters per minute. The graph of the volume, V liters (y-axis), of water in the bath against the time, t minutes (x-axis), in shown in the picture. Write down an equation connecting V and t.

 

[MarkFL]

You are given the slope and intercept of the line. Can you use the slope-intercept form of a line to formulate the answer?

 

[MarkFL]

Let me elaborate. The slope of this line represents the change of the volume with respect to time. We are told it is decreasing at a rate of 30 liters per minute.

The intercept, or volume at time t = 0, is 150 liters.

Thus, the slope is -30, and the intercept is 150.

I am confident that before being assigned this problem you have been given the slope-intercept form of a line.

 

[IslaIng]

Let me elaborate. The slope of this line represents the change of the volume with respect to time. We are told it is decreasing at a rate of 30 liters per minute.

The intercept, or volume at time t = 0, is 150 liters.

Thus, the slope is -30, and the intercept is 150.

I am confident that before being assigned this problem you have been given the slope-intercept form of a line.

Thank you, that now makes sense.