Calculate the average speed of a car stuck in traffic that drives 12 kilometers in 2 hours

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

15/16 as a decimal rounded to the nearest hundredth

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2