Lesson 8 & 9 Assessment Practice

What is the slope of the line? Use the number pad to enter your answer in the box.

Mathematical Equivalence

ON

What does the slope represent in this situation?

• the total cost of the tomatoes

• the cost for each pound of tomatoes

• the total number of pounds of tomatoes

• the number of pounds of tomatoes for each dollar paid

Determine whether each statement about the graph is true. Drag and drop each statement to the collect column.

Groups:

(a) True

,

(b) False

• Adele reads 1/2 page per minute.

• The slope of line A is 2.

• Bryant takes 1.5 minutes to read each page.

• The slope of line B is 3/2.

• Adele reads 3 times faster than Bryant.

How can Nassir show the slope is constant and show what the constant slope represents in this situation? Drag and drop the correct option into each box to answer the question.

Nassir can draw vertical segments from any two points on the line to the ​ (a)   to form ​ (b)   triangles. This will show that the ​ (c)   change divided by the ​ (d)   change for any point on the line is the same, so the slope is constant. The constant slope represents the amount of water collected is the same ​ (e)   the watering can is filled.

• x-axis
• similar
• vertical
• horizontal
• each second that
• y-axis
• congruent
• as the number of seconds

• equal to
• greater than
• less than

Write an equation for the line in slope-intercept form (y = mx + b). Drag and drop a number into each box to write the equation.

y = ​ ​ ​ (a)   x + ​ (b)  

• 35
• 50
• 3
• 4

Shari takes violin lessons. The equation 288x – 4y = -192 relates y, the total cost of the lessons, and x, the number of lessons. Shari incorrectly states that the slope of the line is 288. Why did Shari think that 288 was the slope? Choose one option from each drop-down menu to answer the question.

Shari thought that the ​ (a)   was the slope. She forgot to ​ (b)   . The correct slope is ​ ​ (c)   .

• write the equation in slope-intercept form.
• coefficient of x
• coefficient of y
• divide -192 by 4
• divide 288 by -4
• -48
• 72
• -72
• 48
• constant term

Which statement about Trisha's line is TRUE?

• The slope represents minutes per mile.

• The y-intercept of the line is (26 , 0).

• The y-intercept represents the distance of the race.

What linear equation does each graph represent? Drag an equation into each column to match the graph with its equation.

Groups:

(a) Graph A

,

(b) Graph B

,

(c) Graph C

,

(d) Graph D