Given that W over 4 -7 =m find w in terms of x

The weight of an object in a particular scale is 175.2 lbs. the measured weight may vary from the actual weight by at most 0.1 lbs. what is the range of actual weights of the object

100 points, hi, i’m not sure how to get the equation from the graph and table.

There are 93 calories in a small candy bar how many calories are ther in a half dozen small candy bars?