Of the 75 boys in the 7th grade class, 25 participate in at least one sport. Of the 120 girls in the 7th grade class, 30 participate in at least one sport. Does this and its corresponding table show a proportional relationship? Explain why it does or does not show a proportional relationship.

a. the residual plot for model 1 has a random pattern and is a good fit for the data.

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints