Who wants to be friends???

The parabola opens: y=√x-4 (principal square root) up down right left

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest