Prove whether the quadrilateral is a parallelogram using distance formula or slope formula. Note: If you are using the distance formula, your answer needs to be in the form of a radical or whole number. If you are using the slope formula, it needs to be in the form of a simplified fraction. If the slope is undefined, write undefined. K (2,7), L (6,12), M (13,13), N (9,8) KL= LM =
MN =
KN =
Is this a parallelogram?​

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.