What is that ? are you joking ?
Answer:
"D" only 1 & 2
Step-by-step explanation:
You want to isolate the variable 'y'.

Subtract 10 to both sides:

Divide -3 to both sides:
Answer:
$ 7.37
Step-by-step explanation:
linear increase means increased the same amount every year
increment: (6.21 - 5.39) / 4 = 0.215 =$0.22
1n 2009: 0.22 * 9 + 5.39 = 7.37