Sebastian is taking a multiple choice test. His grade is given by the equation y = 45 – 3x, where y represents his final score and a represents the number of questions he got wrong. What could the number 45 represent in the equation?

Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.