STAAR Day 3: 2C, 3B & 3A Linear Equations & Rate of Change

The graph of a linear function is shown on the coordinate grid.

Which equation is best represented by this graph?

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Several students performed an experiment by dropping marbles that are uniform in size into a jar partially filled with water. They measured the height of the water in the jar after every 5 marbles. The results are shown in the table.

Which function represents the same relationship?

(a)  

What is the slope of this relationship? ​ (b)  

• 0.1
• 5
• 10

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

A downtown shop rents scooters for a one-time cost of $20.50 plus $7.50 per hour. Which equation can be used to find y, the total cost that a group of people must pay to rent a scooter for x hours?

• y = 28x

• y = 20.50 + 7.50x

• y = 20.50x + 7.50

• y = 7.50x

Tags

CCSS.HSF-BF.A.1A

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

The function y = 3.75 + 1.5(x - 1) can be used to determine the cost in dollars for a taxi ride of x miles. What is the rate of change of the cost in dollars with respect to the number of miles?

• $1.50 per mile

• $3.75 per mile

• $4.25 per mile

• $5.25 per mile

Tags

A.3(B)

The graph shows the height of a tree every year. Which of the following is true about the rate of change of the tree's growth?

• The tree grew about 1 foot per year.

• The tree grew about 2 feet per year.

• The tree grew about 4 feet per year.

• The tree grew about 20 feet per year.

Tags

CCSS.8.F.B.4

CCSS.HSF.IF.B.6

What is the slope of the line that passes through the points (2, -8) and (-3, 12)?

Tags

CCSS.8.EE.B.5

9 + 2a = -3 - 4a

• a = -2

• a = 2

• a = 5

• a = -1

Which of the following equations match the given graph?

Tags

CCSS.HSA.REI.D.12