Chapter 9 Mid-Chapter Check

A(n) _____________________ has a value that determines the value of another quantity.

• dependent variable

• equation

• independent variable

A variable whose value is determined by the value of another quantity is called a(n) _______________________.

• dependent variable

• equation

• independent variable

Marco spends a total of d dollars on postage to mail party invitations to each of g guests.

• dependent variable: d

  independent variable: g

• dependent variable: g

  independent variable: d

• dependent variable: Marco

  independent variable: guests

• dependent variable: mail

  independent variable: postage

Sophie has a doll collection with 36 dolls. She decides to sell s dolls to a museum and has r dolls remaining.

• dependent variable: s

  independent variable: r

• dependent variable: r

  independent variable: s

• dependent variable: 36

  independent variable: r

• dependent variable: s

  independent variable: 36

Write an equation for the relationship shown in the table. Then find the unknown value in the table.

• y = x + 7; 14

• y = 7x; 49

• y = x ÷ 7; 49

• y = x + 36; 43

Write an equation for the relationship shown in the table. Then find the unknown value in the table.

• y = 5x; 12

• y = x - 16; 44

• y = 2x; 120

• y = x ÷ 5; 12

Which equation describes the pattern.

The table shows how the number of pepperoni

slices used depends on the number of pizzas made.

• y = 17x

• y = x + 17

• y = 17 ÷ x

• y = x - 32

Which equation describes the pattern.

Brayden is training for a marathon. The table shows how the number of miles he runs depends on which week of training he is in.

• y = m + w

• m = 2w

• w = m ÷ 2

• m = w + 5

The band has a total of 152 members. Some of the members are in the marching band, and the rest are in the concert band. Which equation models how many marching band members m there are if there are c concert band members?

• m = 152 - c

• m = 152 + c

• m = 152c

• m = 152 ÷ c

A coach is ordering baseball jerseys from a website. The jerseys cost $15 each, and shipping is $8 per order. Which equation can be used to determine the total cost y, in dollars, for x jerseys?

• y = 8x + 15

• y = 15x + 8

• x = 8y + 15

• x = 15y + 8