Ineed to find the equation of a line in slope intercept form. i put y=1/2x+1.5 but i don't know if it is right

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

20.ju inces. which ordered pair is a viable solution if x represents the number of books he orders and y represents the total weight of the books, in ounces? (-3,-18) (-0.5, -3) (0,0) (0.5, 3)

Three runners competed in a race data were collected at each mile mark for each runner if the runner ran at a constant pace the data would be linear