What is the common difference/ratio for this sequence and is it arithmetic or geometric? : -12. 3, -9. 7, -7. 1, -4. 5,

Step-by-step explanation:

It is an arithmetic progression.

d = -9.7 - (-12.3) = -9.7 +12.3  =2.6

a .4y4

hope this !

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.