Respuesta :
Answer
an=7n−2
Explanation
In January, 5 homes were sold, in February, 12 homes were sold. In March, 19 homes were sold.
The pattern formed is;
5, 12, 19......
12 - 5 Â = 7
19 - 12 = 7
This shows that, the pattern is an arithmetic progressive.
Testing the rules give from the choices, the correct one is an=7n−2
1st term
5 = 7n−2
   (7×1) - 2 = 5
   = 7-2
   = 5
2nd term
12 = 7n−2  Â
    (7×2) - 2
   = 14 - 2
   = 12
3rd term
19 = 7n−2
  = (7×3) - 2
   = 21 - 2
   = 19
So the correct rule is an=7n−2.
Answer:
an=7n−2
Step-by-step explanation:
Just took it and it's right!