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Can I use my own voice with Goblins?

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What math levels does Goblins cover?

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Does Goblins support English Language Learners?

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M.1HS8.13

Compare properties of two functions each represented in a different way (algebraically, graphically, numerically in tables, or by verbal descriptions). (e.g., Given a linear function represented by a table of values and a linear function represented by an algebraic expression, determine which function has the greater rate of change.)

Example Problems

B(u)

models the battery life remaining (in hours) after

u

uses.

$u$	$B(u)$
1	10
4	6
8	2

Is the following statement about the given data true or false:
The battery life decreases faster between 1 and 4 uses than between 4 and 8 uses.

L(n)

models the amount of laundry detergent (in milliliters) used for

n

loads.

$n$	2	5	10
$L(n)$	100	250	400

Is the following statement about the given data true or false:
The detergent usage increases faster between 5 and 10 loads than between 2 and 5 loads.

F(m)

models the fuel used (in liters) for driving

m

miles.

$m$	50	100	200
$F(m)$	4	8	20

Is the following statement about the given data true or false:
The fuel usage increases faster between 100 and 200 miles than between 50 and 100 miles.

Khan Academy Resources

Comparing linear functions word problems Compare linear functions Comparing linear functions: equation vs. graph Comparing linear functions: faster rate of change Comparing linear functions: same rate of change

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