Question

Is this true? And also how does the equation from y-3=3(x-4) become a positive
y+3=3x-12?

Answer 1

Explanation:

the right equation is :

y-y1=m(x-x1)

y+3=3(x+4)

y+3= 3x+12

y=3x+12-3

y=3x+9