Check the picture below
should be pretty obvious how much silver is needed
just add the volumes
1000= 10^3 -- ten to the third power
assuming you mean whole numbers,
graba calculator, figure out what
1^3, 2^3 3^3 ... 9^3 are
or
1x1x1
2x2x2
3x3x3
...
9x9x9
Divide 3/4 by 5/8
= 6/8 / 5/8 = 6/8 * 8/5 = 6/5
Unit rate is 1 to 6/5 = = 1 to 1.2
The function is constant from x = -2 to x = 1
See how y = 5 there it is constant.