Help me please is of maths
here is the photo

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.

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Which graph represents the equation y =4x