The image has been opened and displayed for me to analyze. Based on the content, it looks like a trigonometric function graph, and the question asks to find an equation of that graph. The typed portion of the image suggests that the form of the equation is in $y = a \cdot \sin(bx + c) + d$.

Let me analyze the features of the graph (such as amplitude, period, phase shift, and vertical shift) to identify the exact equation. Could you confirm if you're trying to identify the sine function in the image, or should I focus on a different part?