Will give brainliest the language arts teacher wants to know whether the students in the entire school prefer a debate or a speech. the teacher draws a random sample from the following groups: all teachers in the school all boys in each grade all students in the speech club all students in each grade which group best represents the population she should take a random sample from to get the best results for her survey? all teachers in the school all boys in each grade all students in the speech club all students in each grade

all teachers

step-by-step explanation:

- "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."