Find the slope of the line passing through the points (-7,2) and (9,6)

Asap describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x). f(x)=-5.8sin x. g(x)=sin x. a: vertical stretch by a factor of 5.8, reflection across y-axis. b: vertical stretch by a factor of 5.8,reflection across x-axis. c: horizontal stretch by a factor of 5.8, reflection across x-axis. d: horizontal stretch by a factor of 5.8 reflection across y-axis.

Me with this one question, and i'll upvote the brainliest answer

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?