Ill give 40 points to brainliest (in each word problem write the independent and dependent variable) A. You work part time at a grocery store and are saving money for a car. You already have $200 saved and you earn $12 per hour. B.You are driving on a road trip with your friends. You have 12 gallons of gas in your car and you use 0.10 gallons each mile you drive. C.You got a 60 on your test. You test grade will improve 2 points with each extra credit assignment you turn in.

Part A

The equation would be y = 12x+200 where x is the number of hours and y is the amount saved. The 200 is what you already have, and then you add on 12x additional dollars.

Part B

equation would be y = -0.10x+12. You start off with 12 gallons and each time you use up 0.10 gallons of gas for each mile you drive, so in total you use up 0.10x gallons

Part C

Equation is y = 2x+60. You add on 2x additional points to the 60 you already have

Part D

x is the number of messages and y is the total monthly bill, so the equation would be y = 0.25x + 35

Part E

eating x cookies, at 120 calories a piece, means y = 120x is the total number of calories you consume per day. This is just considering the cookies of course and not other meals.

In each case, the independent variable is the variable that is allowed to change and you know this value (or are given it). For instance, you know how many miles you drive and it varies. The dependent variable relies on the value chosen for the independent variable. So as x changes, then so does y.

Answers & Step-by-step explanation:

Let's define the two terms that we need to identify:

Independent variable: A variable that you have control over.

Dependent variable: A variable you cannot control and depends on other factors.

Let's solve your problems!

Amount saved: dependent variable

Amount earned: independent variable

Explanation:

The amount you can save depends on how much you earn.

Amount of gas: dependent variable

Amount you drive: independent variable

Explanation:

The amount of gas you have affects how much you can drive.

Test grade: dependent variable

Extra credit you gain: independent variable

Explanation:

Your test grade is dependent on the amount of extra credit you earn.

Monthly bill: dependent variable

Number of texts sent: independent variable

Explanation:

The monthly bill is dependent on the number of texts sent.

Amount of calories per day: dependent variable

Amount of cookies eaten: independent variable

Explanation:

The number of calories eaten each day is dependent on how many cookies you eat.

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