Graphing Lines and Tables

Graph the relation y = -2x + 3 for integer values of x from 0 to 4.

You know this is an equation of a linear function, so the dots you graph will be in a straight line. However, you are not asked to draw the whole line, just put a dot on the graph for each input/output combination. So, if x = 0, find y and plot that point. If x = 1, find y and plot that point, and so on. Which graph matches your results?

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The graph represents linear data. Which statement is incorrect?

• The quantity depends on the price.

• The price is the independent variable.

• The price is a function of the quantity.

• The larger the quantity, the higher the price.

Describe the relationship between the input (x) and output (y) values in this graph.

• When x increases by 1, y increases by 7.

• When x increases by 1, y increases by 5.

• When x increases by 1, y increases by 2.

• When x increases by 2, y decreases by 5.

Describe the relationship between the input (x) and output (y) values in this graph.

• When x increases by 1, y decreases by 12.

• When x increases by 1, y decreases by 2.

• When x increases by 1, y increases by 2.

• When x increases by 2, y increases by 12.

y = 2x + 5

• y = 2x + 5

• y = -2x - 5

• y = -2x + 5

• y = 5x - 2

Which is the graph of y=-x+2?

• A

• B

• C

• D

Graph. y = 2/3x - 3

• a

• b

• c

• d

Graph

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The relations shown on the left are all linear functions.

Which one(s) have graphs that are lines going up and to the right?

• ii and iv

• i and iii

• ii

• i, ii, and iv