Jessica is getting ready for college she needs to have an overall grade of 85 in her math class to qualify for the college that she wished to attend. her math grade is based solely on her scores on 6 exams. on the first 5 exams her scores were 87, 81, 85, 90, 78. write an inequality that represents her predicament. what score does she need to get on her last test to qualify?

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."