Mrs. mitchell decided to grade her projects by giving each student 50 points if they turned in a project and then an additional 5 points for each part they got correct. after looking through some of the projects, she decided to give the students 7 points for each correct section. if mrs. mitchell wrote a function to describe the situation, what would change?

- "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."

is there a picture

step-by-step explanation: