Is this sequence geometric -8,-5,-1,4...

If c1 = -1 and  c2 = 4 and r=3

then we can plug in values  as numerators    

          c1 x c2 . r^b                   c1 x c2 . r^b

= Sb     then      wont be required.

             1 -r                                1/1-r

Where r represents 3 and r can stay 3 it is a geometrical sequence. As c3 value would be unique and so would c4. c5 c6 etc. it is only r and the answer to the first equation each time that keeps it geometric.

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."

they used 313 gallons of paint