Question

what is the equation of the line that passes through (0, 4) and has a slope of -3

Answer 1

Use the point-slope formula \(\large y-y_{1}=m(x-x_{1})\)

Answer 2

or just use y = mx + b

y = mx + b
slope(m) = -3
(0,4) x = 0 and y = 4
now sub
4 = -3(0) + b
4 = 0 + b
4 = b

so your equation is : y = -3x + 4