At the start of summer, Crater Lake 1 1/4 inches below normal. By the end of summer, it had decreased an additional 2 3/8 inches. What is it's new level?

3 5/8 below normal

Step-by-step explanation:

From the question, we are informed that Crater Lake is 1 1/4 inches below normal and that by the end of summer, it had decreased an additional 2 3/8 inches.

The new level will be:

= 1 1/4 + 2 3/8

= 1 2/8 + 2 3/8

= 3 5/8 below normal

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.