The answer would be letter b
5x = -1
x = -1/5 = -0.2
That means that any ordered pair for the line will be (-0.2, y)
You can put any number in for y.
So two ordered pairs could be:
(-0.2, 1)
and
(-0.2, 2)
"The discriminant is prime?" I haven't heard that one before.
Here are the general rules:
1. a positive discriminant results in two real, unequal roots.
2. a zero discr. results in two real, equal roots.
3. a negative discr. results in two complex roots, which sometimes means two imaginary roots.
No, it is an irrational number. It repeats
No, it is an irrational number because it does not terminate/end
