Will all parallelograms have diagonals that are lines of symmetry

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.

What could explain what happened when the time was equal to 120 minutes

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents