Which option correctly describes the transformation from c(x)=(√2(x−1))+3 to b(x)=(√10(x−1))+3?

Responses

horizontal stretch by a factor of 5
horizontal compression by a factor of 1/5

horizontal stretch by a factor of 1/5
horizontal stretch by a factor of  5
horizontal compression by a factor of 5

1 answer

To analyze the transformation from \( c(x) = \sqrt{2}(x - 1) + 3 \) to \( b(x) = \sqrt{10}(x - 1) + 3 \), we can focus on the coefficients in front of the \((x - 1)\) term.

The coefficient of \((x - 1)\) in \( c(x) \) is \(\sqrt{2}\) and in \( b(x) \) it is \(\sqrt{10}\).

To understand the transformation, we can compare the two coefficients. The relationship between the two coefficients can be expressed as follows:

  1. The larger the coefficient, the steeper the slope and the more vertically stretch the graph.
  2. The transformation can be analyzed in terms of horizontal compression or stretch, based on the multiplier effect caused by the square root factor.

Calculating the ratio between the coefficients:

\[ \frac{\sqrt{10}}{\sqrt{2}} = \sqrt{\frac{10}{2}} = \sqrt{5} \]

When comparing the coefficients, the transformation does not directly equate to a simple horizontal stretch or compression. Rather, the transformation of coefficients indicates that to go from \(\sqrt{2}\) to \(\sqrt{10}\), we are essentially increasing the slope. This results in a horizontal compression because the increase in the coefficient leads to a steeper graph.

Specifically, since \( \sqrt{10} = \sqrt{2} \cdot \sqrt{5} \), we can denote that there is a horizontal compression by the factor of \( \sqrt{5} \) since we are multiplying by a factor greater than 1.

Based on typical terminology, however, there is no direct option offered that fits this continuous evaluation.

But if we consider the options given, particularly:

  • "horizontal compression by a factor of 5"

This is a misrepresentation in scaling but might conceptually relate to the adjustments we see, as we move from a smaller coefficient to a larger one.

Therefore, the closest correct option that fits the analysis would be:

horizontal compression by a factor of 5.