Determine whether each situation represents a proportional relationship. If so, determine the constant. If there is no constant, type "none" x 1, 2, 3, 4, 5 Y -3, -6, -9, -12, -15 Proportional? Type yes or no.​

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.

Which is the focus of a parabola with equation y2=4x

Determine the area of a triangle with (see picture below)