Answer:
9)The nth term of an arithmetic sequence with first term a1 and common difference d is given by fn=a1+(n-1)d, where n is a positive integer.
fn=a1+(n-1)d
fn=0+(n-1)3
fn=3n-3
This function is Nonproportional.
check to see if (0,0) is on the graph.
fn=3n-3
0=3(0)-3
0=0-3
0=-3
10) an=a1+(n-1)d
an=-4+(n-1)(4)
an=-4+4n-4
an=4n-8
This function is Nonproportional
check to see if (0,0) is on the graph.
4(0)-8=-8
So, the line does not contain (0,0)
11) The equation is Y=2.25x+2.50.
12)
A) An=a1+(n-1)d
an=1.65+(n-1)1.65
an=1.65+1.65n-1.65
an=1.65n.
B)As the number of hours increases from hour to hour the inches of snowfall also increases at a constant rate. This means that the relation is proportional.