One hose can fill a small swimming pool in minutes. A larger hose can fill the pool in minutes. How long will it take the two hoses to fill the pool working together

Anytime you have these slope questions read the graph like you’re reading a book: from left to right. When you read this graph from left to right, it declines so we know that its negative. Now, remember y=mx+b. Our sign is negative and intercepts at -3. All answer choices are at -3, but the answer would be B because as it declines its lesser than.