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### Course: Algebra (all content)>Unit 3

Lesson 14: Linear models word problems

# Linear models word problem: marbles

Sal solves a word problem about a person filling a glass tank with marbles, The solution involves the modeling of the situation as a linear function.

## Want to join the conversation?

• Could William also figure out how many liters a marble takes up by calculating the volume of the marble, since 1cm^3=1ml?
• You have to solve the problem first before you can do that; then it's not necessary.
(1 vote)
• the equation y=3x+5 has infinite solutions, right?
• Yes. Your equation creates a line when graphed. Every point on the line defines an ordered pair (x, y) that is a solution to the equation. Since there are infinite points on the line, there are infinite solutions to your equation.
• how to solve this question using y=mx+c
• In this type of problem can you but the equation in a y=mx+b form.
• You can always put linear equations into slope intercept form.
• in the math problem the question is reversed so how do you put it in the reversed term
• pls explain the question
• I don't understand how he does stuff...
• For the second question couldn't Sal of just improvised his original equation to get the equation: *200(0.06) + w(the total water needed to be added) = 26.*? It would of been shorter than make a new function all on its own right?