Cereal a cost. $4.20 for a 14-ounce box and cereal b costs $3.90 for a 12-ounce box. which is better?

Cereal Box A is better

Step-by-step explanation:

Given

Two cereal boxes; A and B

Cereal A costs $4.20

Cereal A weighs 14 ounce

Cereal B costs $3.90

Cereal A weighs 12 ounce

To get which is better, we need to calculate the cost of each cereal per unit ounce

To do this, we divide cost of cereal by weight of the box.

i.e. Unit Price = Cost of box ÷ Weight of box

For Box A

Unit Price = $4.20 ÷ 14 ounces

Unit Price = $0.3 per unit ounce

For Box B

Unit Price = $3.90 ÷ 12 ounces

Unit Price = $0.325 per unit ounce

By being better, means cheaper.

Since Cereal Box A costs less than Cereal Box B, then Box A is better

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.