Intermediate Algebra (11th edition)

NOTE Every linear equation (of a nonvertical line) has a unique(one and only one) slope-intercept form. In Section 3.6,we study ...

Writing an Equation of a Line, Given the Slope and a Point Write an equation of the line with slope and passing through the poin ...

Writing Equations of Horizontal and Vertical Lines Write an equation of the line passing through the point that satisfies the gi ...

Use either or as in the point-slope form of the equation of a line. We choose so and Point-slope form Definition of subtraction ...

(b)To be perpendicular to the line a line must have a slope that is the negative reciprocal of which is We use and slope in the ...

If we let xdenote the number of gallons pumped, then the total cost yin dollars can be found using the following linear equation ...

(a)Write an equation that models the data. Since the points in FIGURE 33lie approximately on a straight line, we can write a lin ...

Point-slope form Distributive property Add 183. Retail spending y(in billions of dollars) on prescription drugs in the United St ...

170 CHAPTER 3 Graphs, Linear Equations, and Functions 3.Which equation in Exercise 2is in slope-intercept form? 4.Write the equa ...

39.Through ; slope 40.Through ; slope 41.x-intercept ; slope 4 42.x-intercept ; slope 43.Through slope 1.4 44.Through slope 0.8 ...

For each situation, (a)write an equation in the form ,(b)find and interpret the ordered pair associated with the equation for ,a ...

90.Total sales of fax machines in the United States (in mil- lions of dollars) are shown in the graph, where the year 2003 corre ...

Solve each inequality. See Section 2.5. 2 x+ 569 102. -x+ 473 103. 5 - 3 xÚ 9 104. -x... 0 PREVIEW EXERCISES 174 CHAPTER 3 Gra ...

SECTION 3.4 Linear Inequalities in Two Variables 175 OBJECTIVE 1 Graph linear inequalities in two variables.In Chapter 2,we grap ...

CAUTION A common error in using the method just described is to use the original inequality symbol when deciding which half-plan ...

Graphing a Linear Inequality Graph First graph the boundary line, shown in FIGURE 39. The points of the boundary line do not bel ...

178 CHAPTER 3 Graphs, Linear Equations, and Functions OBJECTIVE 3 Graph the union of two linear inequalities. When two inequalit ...

SECTION 3.4 Linear Inequalities in Two Variables 179 For Discussion or Writing Solve the equation in part (a) and the associated ...

Use the method described in Section 2.7to write each inequality as a compound inequality, and graph its solution set in the rect ...

Write each inequality or compound inequality using interval notation.See Sections 1.1 and 2.6. 53.xÚ 0 54.x... 0 55.x 61 or x 71 ...