A sand dune stands 5 feet above sea level. The hill is eroding at a rate of 1 foot per 20 years. Let y represent the height of the sand dune after x years. Which equation represents the situation?
y = negative StartFraction 1 Over 20 EndFraction x minus 5
y = negative StartFraction 1 Over 20 EndFraction x + 5
y = negative 20 x minus 5
y = negative 20 x + 5Mrs. Jacobson asked her students to write a word problem that describes the graph below.

A graph has days on the x-axis and money on the y-axis. A line goes through points (0, 8) and (4, 0).

Which word problem accurately describes the graph?
Jamie has $8, and she pays $2 per day to ride the bus.
Melinda has $4 and earns $2 allowance per day doing chores.
Carrina has $8, and she earns $2 per day babysitting.
Louise has $4, and she pays $2 per day for school lunch.
Mark this and return