Write an equation of a line thru (3,-1) and (-1,-7)

-1 - (-7) over 3 - (-1) = M

-1 + 7 over 3 + 1 = M

6 over 4 = M

6/4 = M

3/2 = M

Slope form M=y2-y1/x2-x2 M= -7 -(-1)/-1-3 M= -6/-4 M=3/2  So 3/2 is your slope   Now  use one if the pair points (3,-1) and slope to find b. -1=2/3(3)+b -1=2+b -1-2=b -3=b  Y=2/3x-3

you would use (d.) the law of cosines or a^2 = b^2 + c^2 – 2bc(cos a)

, b^2 = a^2 + c^2 – 2ac(cos b), or c^2 = a^2 + b^2 - 2ab(cos c). you wouldn't use b. the law of sines as it is mostly effective when 1side and 2angles are given. a and c aren't the answer for they are the improper versions of the law of cosines. hope this is .

slope is 35 and 20 miles is the y-intercept.

step-by-step explanation: