When point adef was dilated point d (15,3) became point d' (5,1) wht is the scale factor used in dilation?

23. public and private investment in infrastructure include all of the following except a) worker knowledge and skill development b) telecommunication systems, internet provider systems, and power distribution systems c) highways, transit systems, airports, harbors, and educational facilities d) fire departments, police departments, and public safety systems e) water systems, wastewater treatment systems, and navigational systems

Which presentation option is also known as a screen of a presentation?

What is the term eccentricity a measure of?