Does 2, square root of 5, 3 form a right triangle

Triangle knm is what is true about the sides of knm

Identify the function that contains the data in the following table: x     -2         0         2         3         5     f(x)     5         3         1         2         4     possible answers: f(x) = |x| + 1 f(x) = |x - 2| f(x) = |x - 2| - 1 f(x) = |x - 2| + 1

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units