Need answer for this question I would appreciate if you would explain

An equation representing lyle’s hedge-trimming business is a = 12n - 300 where a is the amount of profit or loss in dollars and n is the number of hedges trimmed. how would the graph of lyle’s business change if the equation a = 10n - 300 represented his business? the graph would be flatter. the graph would be steeper. the graph would start closer to the origin. the graph would start lower on the y-axis.

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10