Page 91 - Math Course 3 (Book 1)

Rates of Change

A. 53.8
B. 67.9
C. 70.8
D. 71.7

Answer

Compare Rates of Change Negative Rate of Change

INCOME SCIENCE
The table shows the yearly incomes of two In an experiment, Julia allows water to drip from a
families. Compare the rates of change. graduated glass tube. The table shows the volume
of water in the tube v after t seconds. Find the rate
of change. Interpret its meaning.
Income($)
Years
Browns Greens Times Volume(mL)

1998 45,000 43,000 0 50
1999 48,000 46,000 5 44

2000 51,000 49,500 10 38

2001 55,000 54,000 15 32
A. The Brown’s income increases at a faster rate A. –1.2; The volume decreases by 1.2 mL
than the Green’s income. each second.
B. The Green’s income increases at a faster rate
than the Brown’s income. B. –0.83; The volume decreases by 0.83 mL
C. The Green’s income decreases at a faster rate each second.
than the Brown’s income.
D. The incomes of both families increase at the C. 0.83; The volume increases by 0.83 mL
same rate. each second.

Answer D. 1.2; The volume increases by 1.2 mL
each second.

Answer

83