Math Problem Statement

Solution

The uploaded image contains a series of math problems related to writing equations of lines, identifying slopes, and solving word problems. I will analyze the contents and solve the problems provided.

Problem 1:

Write an equation in point-slope form for the line that satisfies each set of conditions.

  1. Slope = 3, passes through (2, -4)

    Solution: The point-slope form of a line is given by: yy1=m(xx1)y - y_1 = m(x - x_1) Substituting the values: y(4)=3(x2)y - (-4) = 3(x - 2) Simplifying: y+4=3(x2)y + 4 = 3(x - 2)

  2. Slope = -5, passes through (-9, 7)

    Solution: Using the point-slope form: y7=5(x(9))y - 7 = -5(x - (-9)) Simplifying: y7=5(x+9)y - 7 = -5(x + 9)

Problem 2:

Write an equation in point-slope form for a line that passes through each set of points.

  1. (5, 1) and (3, 4)

    Solution: First, calculate the slope mm between the two points: m=y2y1x2x1=4135=32=32m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{4 - 1}{3 - 5} = \frac{3}{-2} = -\frac{3}{2} Using the point-slope form with point (5, 1): y1=32(x5)y - 1 = -\frac{3}{2}(x - 5)

  2. (-3, -7) and (-6, -4)

    Solution: Calculate the slope mm: m=4(7)6(3)=4+76+3=33=1m = \frac{-4 - (-7)}{-6 - (-3)} = \frac{-4 + 7}{-6 + 3} = \frac{3}{-3} = -1 Using the point-slope form with point (-3, -7): y(7)=1(x(3))y - (-7) = -1(x - (-3)) Simplifying: y+7=(x+3)y + 7 = -(x + 3)

Problem 3:

Application Problems

  1. (23) Jennifer logs in twice as much as she plans to run for every swimming lap.

    Note: The complete problem statement is not fully visible, but the idea seems to involve solving a proportional relationship or system of equations related to swimming and running.

If you want further details or have any questions, feel free to ask!


Questions to consider:

  1. How can the point-slope form be converted to slope-intercept form?
  2. What are the advantages of using point-slope form over slope-intercept form?
  3. How would the equations change if you were given the intercepts instead of points?
  4. How do you determine the slope of a line given two points?
  5. Can a line have an undefined slope, and if so, what would its equation look like?

Tip: Remember that when working with the point-slope form, the chosen point on the line does not affect the final equation, as long as the slope is correct!

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Math Problem Analysis

Mathematical Concepts

Equations of Lines
Point-Slope Form
Slope Calculation

Formulas

Point-Slope Form: y - y1 = m(x - x1)
Slope Calculation: m = (y2 - y1) / (x2 - x1)

Theorems

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Suitable Grade Level

Grades 9-12