"Consider the regression line y = x + b where σ 2 ( X ) = 9 and σ 2 ( Y ) = 16 . What is the correlation between x and y ?"

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3