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Question

Write an equation of the slope intercept form, of the line with an x-intercept at (3,0) and a y-intercept at (0,−5)

A
y=43x3
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B
y=53x5
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C
y=6x5
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D
y=12x5
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Solution

The correct option is A y=53x5
Since slope of line passing through two points (x1,y1) and (x2,y2) is m=y2y1x2x1
We now find the slope of the line passing through the points (3,0) and (0,5) as shown below:
m=5003=53
Therefore, the slope of the line is 53.
Now use the slope and either of the two points to find the y-intercept.
y=mx+b
0=53(3)+b
b=5
Write the equation in slope intercept form as:
y=mx+b
y=53x5
Hence, the equation of the line is y=53x5.

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