Which graph represents 10x + 5y > -4?

How do you answer this question? (step by step)

If the slope of one line equals the slope of another line then ? a) the two lines are intersecting lines b) the two lines are perpendicular lines c) the two lines are parallel lines d) the two lines always have very steep slopes

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply