IXL | Find a missing coordinate using slope

The points

(

–

)

and

(

–

)

fall on a line with a slope of

–

What is the value of

ref_doc_title.

Learn with an example

question

The points

(

–

)

and

(

)

fall on a line with a slope of 2. What is the value of

key idea

slope

change in

solution

Take the slope formula and plug in the slope and both pairs of

(

)

coordinates. Then solve for

slope

change in

Plug in 2,

(

–

)

and

(

)

–

Plug in 2,

(

–

)

and

(

)

Simplify

(

)

Multiply both sides by 8

Simplify

Subtract 9 from both sides

The value of

is 7.

Looking for more? Try these:

Lesson: Slope

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Teacher tools

Work it out

Not feeling ready yet? These can help:

Z.2Find the slope from two points

M.16Solve multi-step equations

Lesson: Slope

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