$\"\"$

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The sales of a sandwich store increased from $\"\"$ to $\"\"$ during the first five years of

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business.

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The two ordered pairs which represent the year and their sale are $\"\"$ and $\"\"$ .

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Find the slope.

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$\"\"$ .

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$\"\"$ (Formula for slope)

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$\"\"$ (Substitute $\"\"$ and $\"\"$ )

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$\"\"$ (Subtract: $\"\"$ and $\"\"$ )

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$\"\"$ (Simplify)

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Therefore, the slope is $\"\"$ .

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$\"\"$

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The equation represents that models the sales $\"\"$ after $\"\"$ years.

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Consider the line passes through the point is $\"\"$ ; $\"\"$ .

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Point slope-intercept form of the equation of a line is $\"\"$ .

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Find the point slope intercept line equation.

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$\"\"$ (Formula for Point-slopeintercept)

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$\"\"$ (Substitute $\"\"$ and $\"\"$ )

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$\"\"$ (Distributive property: $\"\"$ )

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Add $\"\"$ to each side.

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$\"\"$

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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Therefore, the equation represents is $\"\"$ .

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$\"\"$

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Find the sales will be at the end of $\"\"$ years if the pattern continues.

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Multiply)

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$\"\"$ (Add: $\"\"$ )

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Therefore, the end of $\"\"$ years, the sale will be $\"\"$ .

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$\"\"$

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The equation represents is $\"\"$ .

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The end of $\"\"$ years, the sale will be $\"\"$ .