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What is an equation of the line that passes through the points \( (-1,7) \) and \( (1,-3) \) ?

Ask by Harris Davey. in the United States
Feb 26,2025

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Answer

The equation of the line is \( y = -5x + 2 \).

Solution

To find the equation of the line passing through (-1, 7) and (1, -3), start by calculating the slope (m):   m = (y₂ - y₁) / (x₂ - x₁)   m = (-3 - 7) / (1 - (-1))   m = (-10) / 2   m = -5 Next, use the slope-intercept form of a line (y = mx + b) and substitute one of the points to solve for b. Using the point (-1, 7):   7 = (-5)(-1) + b   7 = 5 + b   b = 7 - 5   b = 2 Thus, the equation of the line is:   y = -5x + 2

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To find the equation of the line that passes through the points \((-1, 7)\) and \( (1, -3)\), we first calculate the slope \(m\) using the formula \(m = \frac{y_2 - y_1}{x_2 - x_1}\). Plugging in the points, we have: \[ m = \frac{-3 - 7}{1 - (-1)} = \frac{-10}{2} = -5 \] Now, we can use the point-slope form of the line’s equation \(y - y_1 = m(x - x_1)\). Using point \((-1, 7)\): \[ y - 7 = -5(x + 1) \] Expanding this gives: \[ y - 7 = -5x - 5 \\ y = -5x + 2 \] So, the equation of the line is \(y = -5x + 2\). For a little fun, did you know the concept of a slope is often visually represented on a graph? If you think of a mountain, a steep slope means a steep climb! A linear equation like this tells you how y changes as x does—just like navigating a hilly terrain! Now, if you're looking to understand more about why lines are straight or how they make shapes in algebra, reading about transformations in geometry could be a keen next step! Exploring how different equations represent various shapes can really elevate your mathematical journey.

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Algebra Mexico Feb 26, 2025
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