Digits, Grade 8, Volume 1, Homework Helper

### 2-3: TEKS Practice

• 1. Think About the Process • a. Write the expression for the slope of a line using any two points.

• A. fraction horizontalchange , over verticalchange end fraction

• B. fraction verticalchange , over horizontalchange end fraction

• C. vertical change × horizontal change

• D. vertical change − horizontal change

• b. Find the slope of the line shown.

• 2. Find the slope of the line. • 3. Think About the Process

• a. Find the expression that will correctly find the slope of a line that goes through the points (−5, 3) and (5, 7).

• A. fraction 3 minus 7 , over 5 minus open negative 5 close end fraction

• B. fraction 7 minus 3 , over negative 5 minus 5 end fraction

• C. fraction 3 minus . open , negative 5 , close , over 7 minus 5 end fraction

• D. fraction 7 minus 3 , over 5 minus . open , negative 5 , close end fraction

• b. Find the slope of the line.

• 4. Find the slope of the line through the points (−2, 3) and (1,−3).

• 5. Line 1 passes through the points (−2,−7) and (3,3). Line 2 passes through the points (5,1) and (9,1).

• a. Find the slope of each line.

• b. Which line has the greater slope?

• 6. A contractor is roofing a house. The contractor considers a roof to be steep when the roof rises 7 in. or more for every 12 in. it runs. The following graph is a model of how steep the roof is. Does the contractor believe the roof is steep? What is the slope of the roof? • a. No, the contractor does not believe the roof is steep because the slope of the roof is .

• b. Yes, the contractor believes the roof is steep because the slope of the roof is .

• 7. The science teacher is showing students a model rocket. The teacher says for the rocket to be shot correctly the fraction rise , over run end fraction should be from fraction 11in , . , over 4in , . end fraction up to straight up (vertical) before the launch. The graph shows the slope of the rocket before the launch. • a. Find the slope at which the rocket is being shot.

• b. Will the rocket be shot correctly?

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