Math Problem Statement

Graph the line with slope -3 passing through the point (1,1).

Solution

To graph the line with slope 3-3 passing through the point (1,1)(1, 1), we need to follow these steps:

  1. Point-Slope Form: The equation of a line in point-slope form is:

    yy1=m(xx1)y - y_1 = m(x - x_1)

    where mm is the slope and (x1,y1)(x_1, y_1) is a point on the line. In this case, the point is (1,1)(1, 1) and the slope m=3m = -3. Substituting into the formula:

    y1=3(x1)y - 1 = -3(x - 1)

  2. Simplifying:

    y1=3x+3y - 1 = -3x + 3 y=3x+4y = -3x + 4

    This is the equation of the line in slope-intercept form, y=3x+4y = -3x + 4, which tells us the slope is 3-3 and the y-intercept is 44.

  3. Plotting the Graph:

    • Start by plotting the point (1,1)(1, 1) on the graph.
    • From this point, use the slope 3-3, which means for every 11 unit you move to the right (increase in xx), you move 33 units down (decrease in yy).
  4. Finding another point:

    • From (1,1)(1, 1), move right 11 unit to x=2x = 2, then move down 33 units to y=2y = -2. So, another point on the line is (2,2)(2, -2).
  5. Drawing the Line:

    • Now, draw a straight line passing through the points (1,1)(1, 1) and (2,2)(2, -2).

Would you like further details or clarification on how to graph the line?

Here are 5 related questions:

  1. How do you determine the slope of a line from its graph?
  2. What is the general form of a linear equation, and how does it relate to slope-intercept form?
  3. How would the graph change if the slope was positive instead of negative?
  4. How do you find the x-intercept of a line given its equation?
  5. What is the difference between point-slope form and slope-intercept form of a line?

Tip: When graphing lines, always remember that the slope tells you how much the line rises or falls as you move horizontally across the graph.

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Math Problem Analysis

Mathematical Concepts

Algebra
Graphing Linear Equations

Formulas

y - y1 = m(x - x1)
y = mx + b

Theorems

Slope-Intercept Form
Point-Slope Form

Suitable Grade Level

Grades 8-10