an =a1+d(n-1)
a1=-7
d= -4--7=-4+7=3
an =-7+3(n-1)
or
an = -7+ 3n-3
an=-10+3n
Answer:
y = -7 + 3(n-1)
Step-by-step explanation:
The basic formula for an explicit formula is:
[tex]a_{n}[/tex] = [tex]a_{1}[/tex] + d(n-1)
The first term is clearly -7 and the common difference is 3 because each term is 3 more than the term before it:
[tex]a_{n}[/tex] = -7 + 3(n-1)
