What would happen if we ran out of some rare metals used in technology?

Explanation:

Extracting the rare earth elements used in "green" tech is flagrantly dirty. Radioactive minerals such as uranium and thorium are concentrated in the waste rock and sludge produced during mining. Then processing the rare earth minerals causes more severe damage to the land [source: EPA].

ill do it for 100, also this isnt 80 its 40

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6