Question

Write an equation of the line passing through ​(-5​,4​) and having slope -7

Answer 1

y = - 7x - 31

the equation of a line in slope-intercept form is

y = mx + c ( m is the slope and c the y-intercept )

here m = - 7

y = - 7x + c ← is the partial equation

to find c substitute (- 5, 4 ) into the partial equation

4 = 35 + c ⇒ c = 4 - 35 = - 31

y = - 7x - 31 ← equation in slope-intercept form

Answer 2

So the equation of a line is y=mx+b

Now substitute what you know

4 = -5 * -7 +b

4 = 35+b

b=-31

So the equation is:

y = -7x - 31