CyberStein wrote:
Quote:
y = 2x is the equation of the line - fine.
But these two - (3,y) and (x,4) are points. Here y and x are specific co-ordinate points.
Think of them instead as points (3, a) and (b, 4). You need to find a + b.
You will get 10 = 2a + b by equating it to slope but how will you solve for a + b?
The equation of the line is y = 2x
So a = 2*3 = 6
Also, 4 = 2*b
b = 2
So a + b = 6 + 2 = 8
But these two - (3,y) and (x,4) are points. Here y and x are specific co-ordinate points.
Think of them instead as points (3, a) and (b, 4). You need to find a + b.
You will get 10 = 2a + b by equating it to slope but how will you solve for a + b?
The equation of the line is y = 2x
So a = 2*3 = 6
Also, 4 = 2*b
b = 2
So a + b = 6 + 2 = 8
I got the question at hand right (C), but I am uncomfortable as to how I got it right -- it felt
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