Question

In 1987 a recording artist sold 14,000 albums. In 1998 that same artist sold 4,683 albums. Find the rate of change in record sales from 1987 to 1998.
A.
1/847 years per album
B.
–847 albums per year
C.
847 albums per year
D.
–847 years per album

@Adjax

Answer 1

@texaschic101 @Mokeira

Answer 2

\[\frac{Change~in~record~sales}{Change~in~time}\]

Answer 3

slope (rate of change) = (y2 - y1) / (x2 - x1)
(1987,14000)...x1 = 1987 and y1 = 14000
(1998, 4683)...x2 = 1998 and y2 = 4683
now we sub
slope(rate of change) = (4683 - 14000) / (1998 - 1987)
slope = - 9317/11 reduces to - 847/1 or just - 847

you might better get a second opinion

Answer 4

thanks

Answer 5

\[\frac{14683-14000}{1998-1987} = \frac{-19317 ~albums}{11 ~ years} = -847\]

Answer 6

I meant 9317, but yeah.. Texas is right :P