Graphing transformation of radical fractions?

Select the number of ways in which a line and a circle can intersect

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?