Can someone with slipe-intercept of equation from graph problem !

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?

Decide whether the rates are equivalent. 96 miles on 4 gallons, 380 miles on 15 gallons