25-26 Math 8 Unit 3 Test

The two lines graphed on the coordinate grid represent a system of equations. Which ordered pair is the solution of the system of equations?

Hint: Find the point where where the lines intersect

Tags

CCSS.8.EE.C.8B

Sara needs to find the number of feet in several yards of yarn that she bought. Which equation can Sara use to find f, the number of feet in y yards. (1 yard = 3 feet)

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CCSS.6.EE.C.9

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2

The ticket sales for a concert started at 4:00 P.M. The table shows the linear relationship between the number of tickets remaining and the number of hours since 4:00 P.M. Which function can be used to find y , the number of tickets remaining x hours since 4:00 P.M.?

Use Desmos: https://www.desmos.com/testing/texas/graphing

+ a table, enter data

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

What is the value of y when x = 3?

Use Desmos: https://www.desmos.com/testing/texas/graphing

+ a table, enter data

Use the equation given and plug 3 in for x

Mathematical Equivalence

OFF

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Which set of ordered pairs represents y as a function of x?

Function: a rule that assigns exactly one y-value to each x-value

Tags

CCSS.8.F.A.1

Which graph does NOT represent y as a function of x?

Hint: vertical like test

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Which of the following is the graph of a proportional function?

Reminder: Proportional contains (0, 0)

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Tags

CCSS.8.EE.B.5

Categorize.

Groups:

(a) FUNCTION

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(b) NOT A FUNCTION

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Tags

CCSS.8.F.A.1