The table below shows the number of textbooks placed in a stack and the height of the stack. number of textbooks (x) : 3, 4 , 5
Height (y) : 5.25, 7.00, 8.75

Which equation can be used to calculate the height, y, of a stack of x textbooks?

y = 5.25 + x

y = 5.25x

y = 1.75 + x

y = 1.75x

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