Which equation is y +5 = 1/3 (x - 9) in slope-intercept form

The quadratic function h(t) = -16.1t^2 + 150 models a balls height, in feet, over time, in seconds, after its dropped from a 15 story building. from what height in feet was the ball dropped?

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.