El cuadro de la mitad de la suma de dos numeros

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

How can you check that you have correctly converted frequencies to relative frequencies?

Indicate the equation of the given line in standard form. the line containing the longer diagonal of a quadrilateral whose vertices are a (2, 2), b(-2, -2), c(1, -1), and d(6, 4).