# How do you know you need to create a linear equation solve a word problem?

If so, there is a simple answer. You can tell that you need to create a linear equation by the information the problem gives you. The problem should list the Y- intercept, a starting amount of something and a slope, or a rate of change.

For example, here is a problem:

Maddie and Cindy are starting their very own babysitting business. They charge parents $5 dollars right when they come in and$2 for every hour they need to babysit a child. How can they calculate how much they will charge for an evening of babysitting?

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You need to create a linear equation to solve a word problem if the problem involves relationships that can be represented by a straight line, such as proportional relationships, constant rates, or situations where there is a direct relationship between two variables.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- How do you find the slope for (-3, -1), (-1, 5)?
- A scuba diver is 30 feet below the surface of the water 10 seconds after he entered the water and 100 feet below the surface after 40 seconds. What is the scuba divers rate of change?
- How do you find the slope of a line #2y = 8x − 3#?
- How do you graph #y = 4x + 3#?
- How do you graph the line #5x - 2y =1#?

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