Kat Li Heng's answer to Mikoshumi 's Secondary 3 A Maths question.
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(i) This is a multistep approach.
1. Recognise the equation Y=mX + C
Y is the variable on the y-axis. In this case, it is (y-x)/y
X is the variable on the x-axis. In this case, it is just x
2. Find the gradient (y1-y2)/(x1-x2)
3. Find intercept C. Use the points (2,3) and y-intercept (0,y). Use the gradient formula to find out the unknown y.
4. Substitute Y, m, X and C into the equation and make y the subject of the equation.
1. Recognise the equation Y=mX + C
Y is the variable on the y-axis. In this case, it is (y-x)/y
X is the variable on the x-axis. In this case, it is just x
2. Find the gradient (y1-y2)/(x1-x2)
3. Find intercept C. Use the points (2,3) and y-intercept (0,y). Use the gradient formula to find out the unknown y.
4. Substitute Y, m, X and C into the equation and make y the subject of the equation.
Date Posted:
7 years ago
For part (ii)
y=3.
Substitute it into the final answer of (i). The answer will be (6/7, 3).
y=3.
Substitute it into the final answer of (i). The answer will be (6/7, 3).
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