Which statement is true about the equation 22-2=m-7?

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.

When you answer this can you explain

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?