To solve this problem, we need to understand the relationship between the de Broglie wavelength $(\lambda)$ and momentum $(p). \\$The de Broglie wavelength is given by the formula:$\\ \lambda = \frac{h}{p} \\$where $h$ is Planck's constant.$\\$From the formula, we can see that $\lambda$ is inversely proportional to $p. \\$This means that as the momentum $(p)$ increases, the wavelength $(\lambda)$ decreases.$\\$The graph that represents an inverse relationship is a hyperbola.$\\$Let's analyze the options:$\\$• Option 1 shows a linear increase, which is incorrect.$\\$• Option 2 shows a linear decrease, which is incorrect.$\\$• Option 3 shows an upward curve, which is incorrect.$\\$• Option 4 shows a downward curve, which represents an inverse relationship.$\\$Therefore, the correct graph is Option 4, which shows the inverse relationship between $\lambda$ and $p.$