Math Problem Statement

Calculate the exact slope m (rather than a decimal approximation) of the straight line through the given pair of points, if defined. Try to do the problem without writing anything down except the answer. (If an answer is undefined, enter UNDEFINED.) (0, 1) and

− 1 6 , 7 8

Solution

To find the slope mm of a line passing through two points, we use the formula for slope:

m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1}

Given points are (0,1)(0, 1) and (16,78)\left( -\frac{1}{6}, \frac{7}{8} \right).

Substitute these values into the formula:

m=781160m = \frac{\frac{7}{8} - 1}{-\frac{1}{6} - 0}

First, simplify the numerator:

781=7888=18\frac{7}{8} - 1 = \frac{7}{8} - \frac{8}{8} = -\frac{1}{8}

Now simplify the denominator:

160=16-\frac{1}{6} - 0 = -\frac{1}{6}

Now divide the two fractions:

m=1816=18×61=68=34m = \frac{-\frac{1}{8}}{-\frac{1}{6}} = \frac{1}{8} \times \frac{6}{1} = \frac{6}{8} = \frac{3}{4}

Thus, the slope mm is:

m=34m = \frac{3}{4}

Let me know if you want more details or have any questions.

Here are five related questions:

  1. How do you find the slope if one of the points is the origin?
  2. What happens to the slope if the x-coordinates of both points are the same?
  3. Can two points on a vertical line have a defined slope?
  4. How does changing the order of points affect the slope calculation?
  5. What is the significance of a slope of 0?

Tip: The slope formula is a ratio, so understanding fractions simplifies slope calculations.

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Math Problem Analysis

Mathematical Concepts

Algebra
Coordinate Geometry
Fractions

Formulas

Slope formula: m = (y2 - y1) / (x2 - x1)

Theorems

Slope of a line through two points

Suitable Grade Level

Grades 8-10