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Question 12 : Answer is C
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Given that the equation is y = -3x + 6
Matching it to the general equation y = mx + c
slope = -3
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Question 14: Answer is C
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Given that the equation is y - 2x = 4
y - 2x = 4
y = 2x + 4
Matching it to the general equation y = mx + c
slope = 2
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Question 15: Answer is B
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y = -2x + 1
Given that the equation is y = -2x + 1
Matching it to the general equation y = mx + c
slope = -2
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Question 17: Answer is D
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Equation: x = 3
x = 3 is a vertical line, Gradient is undefined.
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Question 18: Answer is C
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When gradient is 0, it means there is no slope.
Then it has to be a horizontal line.
Among the answer, y = 3 is a horizontal line that cuts the y-axis at (0,3)
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Question 19: Answer is A
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When gradient is 0, it means there is no slope.
Then it has to be a horizontal line.
Among the answer, y = 1 is a horizontal line that cuts the y-axis at (0,1)