Question 104436
Question #1- Write the equation of the line with x-intercept (12, 0) and y-intercept (0, 4). 
Slope = m={{{((0-4)/(12-0))}}}={{{(-4/12)}}}={{{(-1/3)}}}
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Use y=mx+b
0={{{((-1/3)(12)+b)}}}
0={{{(-12/3)+b)}}}
0=4-+b
4=b
So,
y={{{(-1/3)x+4)}}}

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Question #2- Rewrite the equation 2x – 9y = –72 as a function of x. 
2x-9y+9y=-72-9y
2x=-9y-72
2x/2=-9y/2-72/2
x={{{((-9/2)y-36)}}}
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Question #3- Given y = 5x2 (5x2this is 5x squared) , find y when x = –2.
y={{{(5x^2)}}}
y={{{(5(-2)^2)}}}
y=(5)(4)
y=20