The problem asks us to find the three inequalities that define the unshaded region R in the given graph. The region is bounded by three lines. The coordinates of the intersection points are given as (1,1), (7,7), and (7,3).

GeometryLinear InequalitiesCoordinate GeometryGraphing
2025/3/28

1. Problem Description

The problem asks us to find the three inequalities that define the unshaded region R in the given graph. The region is bounded by three lines. The coordinates of the intersection points are given as (1,1), (7,7), and (7,3).

2. Solution Steps

First, let's find the equation of the line passing through (1,1) and (7,7). The slope of this line is:
m1=7171=66=1m_1 = \frac{7-1}{7-1} = \frac{6}{6} = 1
The equation of the line is given by yy1=m1(xx1)y - y_1 = m_1(x - x_1). Using the point (1,1), we get:
y1=1(x1)y - 1 = 1(x - 1)
y1=x1y - 1 = x - 1
y=xy = x
Since the unshaded region is above this line, the inequality is yxy \ge x.
Second, let's find the equation of the line passing through (1,1) and (7,3). The slope of this line is:
m2=3171=26=13m_2 = \frac{3-1}{7-1} = \frac{2}{6} = \frac{1}{3}
The equation of the line is given by yy1=m2(xx1)y - y_1 = m_2(x - x_1). Using the point (1,1), we get:
y1=13(x1)y - 1 = \frac{1}{3}(x - 1)
3(y1)=x13(y - 1) = x - 1
3y3=x13y - 3 = x - 1
3y=x+23y = x + 2
y=13x+23y = \frac{1}{3}x + \frac{2}{3}
Since the unshaded region is below this line, the inequality is y13x+23y \le \frac{1}{3}x + \frac{2}{3}, which is equivalent to 3yx+23y \le x + 2.
Third, the vertical line passes through (7,7) and (7,3), so the equation of this line is x=7x = 7. Since the unshaded region is to the left of this line, the inequality is x7x \le 7.

3. Final Answer

The three inequalities that define the unshaded region R are:
yxy \ge x
3yx+23y \le x + 2
x7x \le 7

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