Year 1960 1975 1990 2005 2020 (est.) Population P(t) 200,000 240,000 288,000 345,600 414,720
Which type of function is represented by the table?
es )
A)
Cubic
B)
Exponential
C)
Linear
D)
Quadratic

- "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."

the answer is 15.50 for one mile

b) is slope: 0   y- intercept 15.5