Which of the following sets of ordered pairs is not a function?

a.
{(3, 2) (4, 2) (3, 7)}

b.
{(8, 6) (6, 1) (‒1, ‒1)}

c.
{(2, ‒7) (3, ‒7) (4, ‒7)}

d.
{(‒5, 8) (3, -8) (‒8, 3)}

it would open into a square depending on the type of envelope i’m not sure about the second part

large crystals result from very slow cooling.

evaporation of water: this would produce an evaporite which is a sedimentary rock. like a salt pan in a desert. not possible to have volcanic rocks originate this way.

crystalization in molten earth: slow cooling over time. (hundreds to millions of years)

crystalization at earth's surface: this results in fast cooling. (a few hours to a few months or years)

crystalization from cooling off hot water: that would be a hydrothermal deposit. while associated with volcanics they are not volcanic rocks themselves and usually occur fairly rapidly.

so the rectangle is 80cm (area)

now to find the area of a triangle.

base times height.

4 times 8.

your answer is 96cm.

hope this .