Question

Lines A and B form a linear system. Line A has slope of 3 and an x-intercept of (9, 0). Line B has a slope of 3 and has an x-intercept of (9, 0). How are these lines characterized?

parallel

intersecting

coincidental

not enough information

Answer 1

I started working this out by using the point slope formula

y - y1 = m(x - x1)


slope(m) = 3
(9,0)..x1 = 9 and y1 = 0
now we sub
y - 0 = 3(x - 9)
y = 3x - 18
-3x + y = -18
3x - y = 18

both of your lines will be the same, therefore, your lines are coincidental.