B Tem A class is having their picture taken. The photographer positions himselt 21 teet trom the center of the row of students. When the photographer looks at the last
student at either end of the row, the photographer must turn 45 from center in either direction, as shown in the diagram
21 feet
450
Photographer
Which is the best estimate of the length of the row of students?

i understand 100% 10/10 hit or miss?

step-by-step explanation:

a is the correct

correct answer:

b.(19,-2)

- "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."