Which function represents the dotted graph

What is sin 7x/4 ? i need on this urgent trig

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Need match the functions with correct transformation. f(x) = -3x f(x) = |x-1|+3 f(x) = √(x+3) 1/2x² f(x) = (x+1)²-3 4|x| 1. compress by a factor of 1/2 2. stretch by a factor of 4 3. shift to the left 3 4. shift to the left 1 5. shift up 3 6. reflection