Constant of proportionality between y and x of 0.3

1230

Step-by-step explanation:

Lets find the glasses first. To find the number of glasses she bought we need to multiple the amount per box by the amount of boxes. Lets x equal the total number of glasses.

x=30*16

Multiply the numbers

x=480

She bought 480 glasses

Now lets find the plates. We need to do the same thing. Multiple the number of plates per box by the number of boxes. Let y equal the number of plates

y=25*30

Multiply the two numbers

y=750

She bought 750 plates.

Now to find how many she ordered all together we need to add the two numbers we got. Let z equal the total

750+480=z

Add them

z=1230

She bought 1230 plates and glasses