Question

What is an equation of the line that passes through (0,8) and (4,0)

y=2 x+8
y=2 x+4
y=-2x+4
y=-2 x+8

Answer 1

Explanation:

y=mx+b

m=dy/dx=(0-8)/(4-0)=-8/4=-2

y=-2x+b, using point (4,0)

0=-2(4)+b

b=8

y=-2x+8