You draw a straight line and then put your number on the line. If you have to find a negative number, you can just go below zero. Positive numbers on a number line are always above zero. Hope this helps!
Answer:
What's the question?
Step-by-step explanation:
If the cost increases $0.90 every three years , then the cost increases $0.30 per year. the slope will be 0.3/1 or just 0.3
$20 because 10% of 40 is 10 and the price now is 40 so 2 years before would have been 20
