State if the triangle is each pair are similar

What is the effect on the graph of the parent function f(x) = x when f(x) is replaced with 3f(x)? a) shifts the line 3 units up b) shifts the line 3 units down c) increases the slope of the line by a factor of 3 d) decreases the slope of the line by a factor of 3

Find the area of the regular hexagon if a side is 20 cm.

Will gve pints stars and brainliest