CCSS.Math.Content.8.F.B.4

At what rate did the rain fall?

• 2 cm per hour
• ¹/₄ cm per hour
• ¹/₂ cm per hour
• 4 cm per hour

Tags

CCSS.Math.Content.8.F.B.4

Graph 2x - 4 = y

• A
• B
• C
• D

Tags

CCSS.Math.Content.8.F.B.4

In the equation y = 14x, what is the constant of proportionality?

• y
• x
• 14

Tags

CCSS.Math.Content.8.F.B.4

Find the rate of change

• 5
• -5
• -1/5
• 1/5

Tags

CCSS.Math.Content.8.F.B.4

What does 'b" represent in y=mx+b

• y-intercept
• macaroni
• nothing
• slope

Tags

CCSS.Math.Content.8.F.B.4

Which linear equation has a slope of -3 and a y-intercept of (0,4)?

• y = 3x - 4

• y = -3x + 4

• y = 4x - 3

• y = -4x + 3

Tags

CCSS.Math.Content.8.F.B.4

Joe is buying carpet for a 15-foot-by-10-foot room. If carpeting costs $1.50 per square foot, how much will it cost?

• $37.50

• $22.50

• $2.25

• $225

Answer explanation

$15\cdot10=150$

The room is 150 square feet. The price is more than a dollar per square foot. Therefore, it must be more than $150.

Tags

CCSS.Math.Content.8.F.B.4

Find the slope of the line.

• Undefined
• 0
• 1
• -1

Tags

CCSS.Math.Content.8.F.B.4

What is the equation of the line?

• y = 5x - ⅔
• y = ⅔x - 5
• y = -5x + ⅔
• y = -⅔x + 5

Tags

CCSS.Math.Content.8.F.B.4

Students in a science class investigated how the speed of sound changes with the air temperature outside. The data are shown in the scatterplot.

Based on the scatterplot, what is the best prediction of the speed of sound when the air temperature is  $50\degree C$  ?

• 350 m/s

• 355 m/s

• 360 m/s

• 365 m/s

Tags

CCSS.Math.Content.8.F.B.4