What is the equation of the line that passes through (2, 1) and has a slope of 4? A. y = 1/4x - 7
B. y = 4x -7
C. y = 7x - 4
D. y = 4x
please help quickly this is due in a couple of minutes

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units