What is the slope of the line through (- 1, - 7) and (3, 9) ?
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The number of hours required for 3 tractors to plow the field is 2.4 hours
<em><u>Solution:</u></em>
Given that 5 tractors can plow a field in 4 hours
We have to find out number of hours required for 3 tractors to plow the field
5 tractors can plow a field in 4 hours, So time taken for 1 tractor
<em><u>So time taken for 3 tractors is given as:</u></em>
time taken for 3 tractor = time taken for 1 tractor x 3
So number of hours required for 3 tractors to plow the field is 2.4 hours
This is a vertical line. Vertical lines are composed by points who share the same x coordinate.
That's why the equation of the line is exactly , where k is the shared x coordinate.
In your case, the common x coordinate is 3, so the line is