Aresearcher wants to determine if extra homework problems 8th grade students learn algebra. one 8th grade class has extra homework problems and another 8th grade class does not. after 2 weeks, the both classes take an algebra test and the results of the two groups are compared. to be a valid matched pair test, what should the researcher consider in creating the two groups?

If its non of them tell me..valerie took a day-trip. she drove from her house for a while and took a coffee break. after her coffee break, she continued driving. after  2  hours of driving after her coffee break, her distance from her house was  210  miles. her average speed during the whole trip was  60  miles per hour.valerie created the equation  y−210=60(x−2)  to represent this situation, where  xx  represents the time in hours from her coffee break and  yy  represents the distance in miles from her house.which graph correctly represents valerie's distance from her house after her coffee break?