Richard M. answered 04/07/17
Tutor
New to Wyzant
Mathematics Educator
Use the equation y= mx + b, m = -2, so y= -2x +b
substitute y =32 and x =10.
the equation becomes:
32 = -2(10) + b , solve for b, substitute.
32 = -20 + b add 20 to both sides
52 = b.
Check your work
32 = -2(10) + 52
32= -20 + 52
32 = 32.