<span>y+4=3(x-7)
y + 4 = 3x - 21
y = 3x - 21 -4
y = 3x - 25
when x = 7
y = 3(7) - 25
y = -4
Therefore (7, -4) pass through this equation </span>
B) sunlight travels through space - there is nothing to bounce off of until it hits an atmophere

<u>Answer</u><u>:</u>
x = -6 or x = 2
Hope you could get an idea from here.
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