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If a ship's path is mapped on a coordinate grid, it follows a straight-line path of slope 4 and passes through point (1, 2).

Part A: Write the equation of the ship’s path in slope-intercept form.

Part B: A second ship follows a straight line, with the equation x + 4y − 20 = 0. Are these two ships sailing perpendicular to each other? Justify your answer.

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texaschic101
ship 1 : this has a slope of 4

ship 2 : 
x + 4y - 20 = 0
4y = -x + 20 
y = -1/4x + 5...slope here is -1/4

so ship 1 has a slope of 4, and ship 2 has a slope of -1/4. These ships are traveling perpendicular to each other because perpendicular lines have negative reciprocal slopes. To find the negative reciprocal of a number, flip the number and change the sign.

so take 4 or 4/1....flip it, making it 1/4....change the sign, making it -1/4. Hence,  ur lines have negative reciprocal slopes and are therefore, perpendicular.

Answer:6

Step-by-step explanation:

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