2021 Illustrative Math Grade 8 Unit 4 EOU Review

What does the "b" represent in y=mx+b?

• slope

• x-intercept

• y-intercept

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Paul the plumber charges $100 per hour plus a flat fee of $25 for a service call. Write a linear equation to model this situation.

• y = 100x

• y = 25x

• y = 25x + 100

• y = 100x + 25

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Solve:
7x - 3x - 8 = 24

• 8
• -8
• 3.2
• 4

Tags

CCSS.8.EE.C.7B

The graph represents the height of a burning candle.  What is the meaning of the y-intercept?

• the time it takes to burn the entire candle
• the rate at which the candle is losing height
• the change in the height of the candle each hour
• the original height of the candle

Tags

CCSS.HSF.LE.B.5

Where do these two lines intersect?

• (2, -9)

• (-9, 2)

• No solultion

• (2, 9)

Tags

CCSS.8.EE.C.8A

What is the solution to the system of equations shown on the graph?

• (6, 3)

• (3, 6)

• (-6, 3)

• No solution

Tags

CCSS.8.EE.C.8B

What is the solution to the system of equations shown on the graph?

• No solution

• (0, 1)

• (0, -2)

• (4, 3)

Tags

CCSS.8.EE.C.8A

Which is the graph of y= -x + 2?

• A
• B
• C
• D

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

CCSS.HSF.IF.B.4

CCSS.HSF.IF.C.7

If a system of linear equations graphed on the coordinate plane has one solution, what does this mean about the two lines?

• they are parallel

• they are identical

• they intersect at one point

Tags

CCSS.8.EE.C.8A

Solve:
y = 7x + 9
2y + 2x = -18

• (5, 0)
• (9, 18)
• (-2, -5)
• (1, 16)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6