Can someone show me how to do liner like in any expression

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent and the median amount spent? 40 25 8 36 18 15 24 27 43 9 12 19 22 34 31 20 26 19 17 28

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12