Question

What is the point-slope form of a line that has a slope of 3 and passes through the point (–1, 4)?

y – (–1) = 5(x – 4)

4 – y1 = 3(–1 – x1)

y – 3 = –1[(x – (–4)]

y – 4 = 3[(x – (–1)]

Answer 1

D

Explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

here m = 3 and (a, b) = (- 1, 4), hence

y - 4 = 3( x - (- 1)) which simplifies to

y - 4 = 3(x + 1)