IXL | Interpret graphs of proportional relationships

In a flash of sheer brilliance, Roxanne invents a time machine! The machine uses a small nuclear reactor to generate the electricity it needs to travel back in time.

The graph shows the proportional relationship between how many years Roxanne wants to travel back in time,

and how much electricity (in megawatts) her time machine needs,

What does the point

(

)

represent?

To travel back 2 years, Roxanne's time machine needs 6 megawatts of electricity.

To travel back 6 years, Roxanne's time machine needs 2 megawatts of electricity.

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Learn with an example

question

Ling loves to wear socks with crazy patterns. She finds a great deal for these kinds of socks at her favorite store, Rock Those Socks.

The graph shows the proportional relationship between the number of pairs of socks that Ling buys,

and the total cost (in dollars),

What does the point

(

)

represent?

Ling can buy 6 pairs of socks for $3.

Ling can buy 3 pairs of socks for $6.

solution

The point

(

)

has

x-coordinate

3 and

y-coordinate

In this relationship, x represents the number of pairs of socks that Ling buys, and y represents the total cost (in dollars). So,

(

)

represents this statement:

Ling can buy 3 pairs of socks for $6.

Looking for more? Try these:

Lesson: Proportional relationships

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LL.2Objects on a coordinate plane

Lesson: Proportional relationships

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