Represent Linear Expressions

Write a linear expression in simplest form to represent the perimeter of the triangle. Find the perimeter if the value of x is 5 centimeters.

• 10x - 6

  44 cm

• 5x + 6

  31 cm

• 10x + 6

  56 cm

• 10x + 9

  59 cm

The side length of a square is (5x + 1) inches.

Write a linear expression in simplest form to

represent the perimeter of the square. Then

find the perimeter if x equals 4 inches.

• 20x + 4

  84 in

• 10x + 2

  42 in

• 5x + 1

  21 in

• 15x + 3

  48 in

Find the sum:  (6 - k) + (4k + 1)

• 5k + 7

• 3k + 7

• 5k + 5

• 3k + 5

Does this relationship represent a linear relationship?

• Yes

• No

Does this table represent a linear relationship?

• yes

• no

Write an equation using the constant of proportionality.

• y = 5x

• y = 4x

• y = 8x

Suzy is participating in a walkathon. She writes the equation m= 3d +50 to represent the amount of money she collects from each sponsor for walking d kilometers. What number represents the rate of change?

• 50

• 3

• 0

• 1

Joe is keeping track of the amount of money in his lunch account each week. He writes the equation A = -5d + 100. What number represents the rate of change?

• 100

• 0

• 5

• -5

Billy opened a bank account with $200, and every week he spends $15.

Which equation best represents this situation?

• y = -15x + 200

• y = 15x - 200

• y = 200x + 15

• y = 15x + 200

Fred the Sloth is very slow. The graph shows how far Fred moves in a given time.

What is the rate of change in the graph?

• 3 ft/min.

• 6 ft./min.

• 2 ft./min.

• -4 ft./min.