The points on the graph were (1,-2) and (3,2). what was the slope?

2

Step-by-step explanation:

slope equation: y2-y1/x2-x1

2-(-2)/3-1=4/2=2

for any of you who need the translation here it is

step-by-step explanation:

find the angular size of the equatorial radius of the earth, if the horizontal parallax of the sun

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.