Independent and Dependent Variables - Super Teacher Worksheets

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Independent and Dependent Variables

Writing Equations, Creating Tables & Graphs

Directions: Identify the dependent and independent variables for each scenario. Write an equation to represent the relationship between variables. Finally, create a table and a graph to show the constant relationships.

1. Gabrielle is saving money for a vacation. Each week she saves $40. Let s represent the total amount of money Gabrielle saves, and let w represent the number of weeks. Create a table and a graph to show how much money she would save from 1 to 7 weeks.

Dependent variable: _________________________________________________________________

Independent variable: _______________________________________________________________

Equation: _____________________________________________

Number of Total Amount

Weeks

Saved

w

40w or s

x-axis

y-axis

Total Amount Saved ($)

280 240 200 160 120

80 40

0

1

2

3

4

5

6

7

Number of Weeks

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Independent and Dependent Variables

Writing Equations, Creating Tables & Graphs

2. Nataliah can read 160 words per minute. Let w represent the total number of words Nataliah reads, and let m represent the number of minutes she spends reading. Create a table and a graph to show how many words Nataliah will read from 1 to 5 minutes. Don't forget to label your axes. Dependent variable: _________________________________________________________________ Independent variable: _______________________________________________________________ Equation: _____________________________________________

0

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Independent and Dependent Variables

Writing Equations, Creating Tables & Graphs

3. Zoe is shopping for fruit at the local farmer's market. She knows she wants to buy a bushel of peaches for $12.00, plus some plums. Plums cost $2.00 each. Create a table and a graph to show Zoe's total cost, t, when she buys 1 to 6 plums, p. Don't forget to label your axes. Dependent variable: _________________________________________________________________ Independent variable: _______________________________________________________________ Equation: _____________________________________________

0

Super Teacher Worksheets -

Independent and Dependent Variables

Writing Equations, Creating Tables & Graphs

4. Jabari pays $45 per month for his cell phone bill. Let t represent Jabari's total cost, and let m represent the number of months. Create a table and a graph to show how much Jabari will pay for his cell phone for one year. Don't forget to label your axes. Dependent variable: _________________________________________________________________ Independent variable: _______________________________________________________________ Equation: _____________________________________________

0

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ANSWER KEY

Independent and Dependent Variables

Writing Equations, Creating Tables & Graphs

1. Dependent variable: _____t_o__t_a_l__a_m___o__u_n__t_s_a___v_e__d__(_s__)______ Independent variable: ___n_u__m__b__e__r_o__f_w__e__e__k__s__(w___)_______ Equation: __s__=___4_0__w_____________________________

2. Dependent variable: ______to__t_a__l _w__o__r_d__s_r_e__a__d__(__w__)_________ Independent variable: ___n__u_m___b_e__r__o_f__m__i_n_u__t_e__s__(_m__)_____ Equation: __w____=__1_6_0__m___________________________

Number of Weeks

w

Total Amount Saved

40w or s

1

40

2

80

3

120

4

160

5

200

6

240

7

280

Total Amount Saved ($)

280 240 200 160 120

80 40

0

1

2

3

4

5

6

7

Number of Weeks

Number of Minutes m

1 2 3 4 5

Total Words Read

160m or w

160 320 480 640 800

Total Words Read

800 640 480 320 160

0

1

2

3

4

5

Number of Minutes

3. Dependent variable: ______t_o_t_a__l_c__o__s_t_(_t__)___________________ Independent variable: ___n__u_m___b__e_r__o_f__p_l_u__m___s_(__p_)________ Equation: __t__=___2_p___+__1_2_________________________

4. Dependent variable: ______to__t_a__l _c__o__s_t_(_t__)___________________ Independent variable: ___n__u_m___b_e__r__o_f__m__o__n_t_h__s__(_m___)_____ Equation: __t__=___4_5__m_____________________________

Number of Plums p 1 2 3 4 5 6

Total Cost

2p + 12 or t 14 16 18 20 22 24

Total Cost

24 22 20 18 16 14

0

1

2

3

4

5

6

Number of Plums

Number of Months m 1 2 3 4 5 6 7 8 9 10 11 12

Total Cost

45m or t 45 90 135 180 225 270 315 360 405 450 495 540

Total Cost

540 495 450 405 360 315 270 225 180 135

90 45

0 1 2 3 4 5 6 7 8 9 10 11 12

Number of Months

KH

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