Unit 5, Lesson 9

Calculating Slope

Accelerated 7

Practice

For each graph, calculate the slope of the line.

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Match each pair of points with the slope of the line that passes through each pair.

\((9,10)\) and \((7,2)\)
\((\text-8,\text-11)\) and \((\text-1,\text-5)\)
\((5,\text-6)\) and \((2,3)\)
\((6,3)\) and \((5,\text-1)\)
\((4,7)\) and \((6,2)\)

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Match each expression in the first list with an equivalent expression from the second list.

\(5(x+1) - 2x + 11\)
\(2x + 2 + x + 5\)
\(\frac {\text{-}3}{8}x - 9 + \frac58x + 1\)
\(2.06x - 5.53 + 4.98 - 9.02\)
\(99x + 44\)

\(\frac14x - 8\)
\(\frac12(6x+14)\)
\(11(9x+4)\)
\(3x+16\)
\(2.06x +(\text-5.53) + 4.98 + (\text-9.02)\)

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Andre said, “I found two figures that are congruent, so they can’t be similar.”

Diego said, “No, they are similar! The scale factor is 1.”

Do you agree with either of them? Use the definition of similarity to explain your answer.

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