Exam 3: Graphs, Linear Equations, and Inequalities in Two Variables; Functions From Campus to Careers: Physical Therapis

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Refer to the line graph. At what times (A, B, C or D)do you find the following conditions: runner 1 running and runner 2 running? Refer to the line graph. At what times (A, B, C or D)do you find the following conditions: runner 1 running and runner 2 running?

(Multiple Choice)
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Determine whether the linear equation defines yy to be a function of xx . If so, find the domain and range. y=13x1y = \frac { 1 } { 3 } x - 1  Determine whether the linear equation defines  y  to be a function of  x  . If so, find the domain and range.  y = \frac { 1 } { 3 } x - 1

(Multiple Choice)
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The graph below gives the heart rate of a woman before, during and after an aerobic workout. Is it true that her heart rate 40 minutes after beginning her workout was 150? The graph below gives the heart rate of a woman before, during and after an aerobic workout. Is it true that her heart rate 40 minutes after beginning her workout was 150?

(True/False)
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Graph the linear equation. 4xy=54 x - y = 5

(Multiple Choice)
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The graph shown gives the first-class postage rates in the year 1999 for mailing items weighing up to 5 ounces. According to the graph, which of the statements is incorrect? Weight (oz)and Postage Rate (cents) The graph shown gives the first-class postage rates in the year 1999 for mailing items weighing up to 5 ounces. According to the graph, which of the statements is incorrect? Weight (oz)and Postage Rate (cents)

(Multiple Choice)
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Determine if the slopes of these lines are positive, negative, zero or undefined. Determine if the slopes of these lines are positive, negative, zero or undefined.

(Multiple Choice)
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An automated production line uses distilled water at a rate of 700 gallons every 4 hours to make toothpaste. After the line had run for 6 hours, planners noted that 1700 gallons of distilled water remained in the storage tank. Find the number of gallons of distilled water in the storage tank when the production line began.

(Multiple Choice)
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The point with coordinates x = -1 and y = 19 lies in the first quadrant.

(True/False)
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The graph, given below, shows the relationship between the market value v of a house and the time t since it was purchased. When did the value of the house reach its lowest point? The graph, given below, shows the relationship between the market value v of a house and the time t since it was purchased. When did the value of the house reach its lowest point?   __________ years after purchase __________ years after purchase

(Short Answer)
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Change the equation to slope-intercept form. 2x11y=12 x - 11 y = 1

(Multiple Choice)
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The grade of a highway up a hill is 27%. How much change in horizontal distance is there if the vertical height of the hill is 250 feet? Express the answer to the nearest foot.

(Multiple Choice)
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Graph the equation using the intercept method. Label the intercepts on the graph. 3x+4y8=03 x + 4 y - 8 = 0

(Multiple Choice)
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Find the slope of the line by finding the coordinates of two points on it. y = 9 x

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The cost ( c )of playing an online computer game for a time ( t )in hours is given by the equation c = 3 t + 5. Label the horizontal axis t and the vertical axis c , and graph the equation for nonnegative values of t .

(Multiple Choice)
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The graph shows the relationship between the percent P of those surveyed who rated their senator's job performance as satisfactory or better and the time t she had been in office. The graph shows the relationship between the percent P of those surveyed who rated their senator's job performance as satisfactory or better and the time t she had been in office.   When did her job performance rating reach a maximum? __________ months after election When did her job performance rating reach a maximum? __________ months after election

(Short Answer)
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Graph the linear equation. 3x=23 x = - 2

(Multiple Choice)
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Solve 7x+8y=87 x + 8 y = 8 for y.

(Multiple Choice)
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Graph the equation using the intercept method. Label the intercepts on the graph. 2x+3y=62 x + 3 y = 6

(Multiple Choice)
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Graph the equation using the intercept method. Label the intercepts on the graph. 2y=4x62 y = 4 x - 6

(Multiple Choice)
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Match the phrases to make true statements.
Premises:
A line with positive slope
Responses:
falls from left to right
rises from left to right
Correct Answer:
Verified
Premises:
Responses:
A line with positive slope
falls from left to right
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