Problem 15 of 7
A tank starts with 20 gallons and drains 5 gallons per minute. Write a two-variable equation with a starting value and rate.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
model intercept and slope in context.
Hidden until you reveal it.
Equation must include both an initial value and a rate of change.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Find the starting value.
2. Find the rate per input unit.
3. Write output = rate times input plus starting value, using subtraction for decrease.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Proportional model missing the starting value.