The points (80, 20) and (120, 30) form a proportional relationship. What is the slope of the line that passes through these points?

Which answer correctly lists the four main types of animal tissue?

Which of the following best explains why the game of economics does not have a single goal

Which of the following activities would conserve the most energy? installing a dimmer switch on a light using a blender instead of a food processor hanging clothes to dry on a clothesline instead of ironing them opening a window instead of turning on the air conditioning setting your computer's screen saver to turn on after less time has elapsed