find an equation on the line (in y=max+b form) that has a slope of -2 and goes through the point (2,-1)

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e. g. 98.7654). x f(x) 0 1 2 3

Can someone explain to me how to do

What is the rate for one gallon of gasoline