Pls its a chem test help me

a. looks to be directly proportional because as one goes up, so does the other.

b. the pressure can be found from the line you create with the x and y values. the pressure will be less than 726 since you can see the values go down as temp goes down.

if that website calculator does not have an equation creator, you'd have to use excel to calculate pressure at 0°c, there's an excel function thst would estimate the value.

since it's a test, this was the fastest info I could gather.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg