The following figure depicts data points from field sampling, as well as line modeling the relationship between the surface temperature of a freshwater pond and the density of a population of branchiopod cladoceran (a microscopic crustacean). The mathematical equation depicting the model and the associated p-value examining the significance of the trend are given below the figure. Model: Cladoceran Density (individuals/mL) = 1.516 * (Surface Temperature, C); P = 0.008 From the model, identify the null hypothesis explaining the relationship between the two variables Pond surface temperature increases with an increase in cladoceran density. Pond surface temperature decreases with an increase in cladoceran density. Cladoceran density increases with an increase in pond surface temperature. Cladoceran density decreases with an increase in pond surface temperature. There is no relationship between the surface temperature of a pond and cladoceran density