You're absolutely right! Here's how to use the equation to find the height of the door frame in inches:

* Equation: y = 12x

* y represents the height in inches

* x represents the height in feet

* Given: The door frame is 5.75 feet tall (x = 5.75)

* Solve: Substitute 5.75 for x in the equation:

* y = 12 * 5.75

* y = 69

Therefore, the door frame is 69 inches tall.