Short Answer
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Determine whether each relation is a function.
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1.
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{(-2, 4), (0, 5), (2, 4), (3, 5), (-2, 1), (1, 4)}
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2.
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Write an equation that describes each sequence. Then find the indicated
term.
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3.
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16, 28, 40, 52, ...; 20th term
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4.
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600, 570, 540, 510, ...; 14th term
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5.
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Find four solutions of 4 x  3 y = 2. Write the
solutions as ordered pairs.
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6.
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Graph y =  2 x + 3 by plotting ordered
pairs. 
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7.
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Find the rate of change for the function. 
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8.
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The cost of gasoline varies directly with the number of gallons bought. If 4
gallons of gasoline cost $16.80, find the cost of 15 gallons.
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9.
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Use the graph below. Find the slope of the line. 
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10.
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Find the slope of the line that passes through the points A(5,  1) and B(3,  1).
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11.
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The table shows the percent of adults who used computers from 1984 through 2007.
What was the rate of change from 1989 to 2007? Source: U.S.
Census
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12.
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State the slope and the y-intercept of the graph of 5 x  2 y = 6.
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13.
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The number of miles y in a measure varies directly as the number of
kilometers x. Write a direct variation equation that could be used to convert kilometers to
miles, if 5 kilometers is about 3.1075 miles.
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14.
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Graph a line with slope  and y-intercept  1. 
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15.
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What is the equation in slope-intercept form of a line with slope of  4 and y-intercept of 2?
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16.
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What is the equation in slope-intercept form of a line passing through points
(2, 5) and (3, 7)?
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Use the scatter plot below that shows the relationship between the blood
pressure and ages of different people.
 
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17.
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Draw a line of fit for the data.
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18.
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Predict the blood pressure of a 20-year old.
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19.
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Solve the system of equations by graphing. y =   x
y =   x  2 
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20.
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Solve the system of equations by substitution. x 
5 y = 3 3 x = 2 y  4
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21.
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The profits P in dollars from a lemonade stand can be modeled by the
equation P( x) = 0.25 x  6.50, where x
represents the number of glasses sold. Find the y-intercept and explain what it represents
in this problem.
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