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.