Please can someone help with this. Not sure where I am going wrong? Find the equation of the line joining points (1,9) and (3,1)

m=y2-y1/x2-1= 1-9/3-1=-8/2=-4

m= -4, a = 3, b= 1

y-b= m(x-a)
y-1=-4(x-3)
y-1=-4x+12
y= -4x + 11

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.

Find the missing dimension extra points

Sally deposited money into a savings account paying 4% simple interest per year.the first year,she earned $75 in interest.how much interest will she earn during the following year?