Johann wants to find a rectangular solar panel with an area of 128 cm. If thewidth of a panel is 20 cm, what must be the length? Is this an example ofdirect variation or inverse variation?

Answer:The length of rectangular panel is 6.4 cm. Step-by-step explanation:We are given the following information in the question:Area of rectangular solar panel = 128 square cmWidth of panel = 20 cmWe have to find the length of the panelFormula:[tex]\text{Area of rectangular panel} = \text{Width}\times \text{Length}\\\Rightarrow 128 = 20\times \text{Length}\\\\\text{Length} = \displaystyle\frac{128}{20} = 6.4\text{ cm}[/tex]Hence, the length of rectangular panel is 6.4 cm.This is an example of direct variation as greater would be length and breadth, the greater would be the area.