Just the first please

Convert 16 yards to feet use the conversion rate 3 feet = 1 yard

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

The area of square garden is 300m squared. how long is the diagonal?