Unit 3 Test Review

Which graph represents a function with direct variation?

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Tags

CCSS.8.EE.B.5

What is the constant of variation for the subscription cost based on the number of weeks?

• $1.50

• $7.50

• $15.00

• $30.00

Tags

CCSS.HSF-LE.A.1B

• $y=\frac{1}{2}x+2$

• $y=\frac{1}{2}x-4$

• $y=\frac{1}{2}x+\frac{5}{2}$

• $y=\frac{1}{2}x-\frac{7}{2}$

Which equation represents the line that passes through (–6, 7) and (–3, 6)?

• $y=-\frac{1}{3}x+9$

• $y=-\frac{1}{3}x+5$

Line CD passes through points C(3, –5) and D(6, 0). What is the equation of line CD in standard form?

• 5x + 3y = 18

• 5x – 3y = 30

• 5x – y = 30

• 5x + y = 18

Tickets to a basketball game can be ordered online for a set price per ticket plus a $5.50 service fee. The total cost in dollars for ordering 5 tickets is $108.00. Which linear function represents c, the total cost, when x tickets are ordered?

• c(x) = 5.50 + 20.50x

• c(x) = 5.50x + 20.50

• c(x) = 5.50 + 21.60x

• c(x) = 5.50x + 21.60

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

• $y-2=3\left(x+\frac{1}{2}\right)$

• $y+\frac{1}{2}=3\left(x-2\right)$
  

Which is the graph of the equation ?

 $y-1=\frac{2}{3}\left(x-3\right)$  

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Which steps should be used to graph the equation

• 1. Plot the point (2, 4).

  2. From that point, count left 3 units and down 1 unit and plot a second point.

  3. Draw a line through the two points.

• 1. Plot the point (2, 4).

  2. From that point, count left 1 unit and down 3 units and plot a second point.

  3. Draw a line through the two points.

• 1. Plot the point (–2,4).

  2. From that point, count left 3 units and down 1 unit and plot a second point.

  3. Draw a line through the two points.

• 1. Plot the point (–2,4).

  2. From that point, count left 1 unit and down 3 units and plot a second point.

  3. Draw a line through the two points.

What is the y-intercept of the function f(x)= 4 – 5x?

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3