With will make brainiest 1. based on the table, what is the unit rate for one gallon of gasoline? gasoline number of gallons price 2-$6.60 3-$9.90 4-$13.20 a.$3.30 b.$4.60 c.$5.60 d.$6.50 2.which table shows a constant of proportionality of 2 for the ratio of string instruments to percussion instruments?

Part 1) option A

Part 2) Table 3 see the attached figure

Step-by-step explanation:

Part 1)

we know that

A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form or

The table represent a direct variation

The unit rate for one gallons of gasoline is equal to the constant of proportionality k

Let

x-----> the number of gallons

y-----> the price

so

For ,

Find the value of k

Part 2)

Let

x------> string instruments

y------>  percussion instruments

table 1

the ratio is equal to

table 2

the ratio is equal to

table 3

the ratio is equal to

table 4

the ratio is equal to

answer: 2x + 2 − 2 = 10 − 2; subtraction property of equality

step-by-step explanation:

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8