Question

Match the following equations with their sum of slope and y-intercept.

• A. 0.0
• B. 1
• C. 2
• D. 3

Answer 1

The equation of a line having 'm' as slope and 'c' as y-intercept is $y=mx+c$.

$2x-y+1=0\to y=2x+1$
So, slope and y-intercept are 2 and 1 respectively.

Sum = 2+1 = 3

$x-y+1=0\to y=x+1$
So, slope and y-intercept are 1 and 1 respectively.

Sum = 1+1 = 2

$3x-3y=0\to x-y=0\to y=x$
So, slope and y-intercept are 1 and 0 respectively.

Sum = 1+0 = 1

$x-y-1=0\to y=x-1$
So, slope and y-intercept are 1 and -1 respectively.

Sum = 1-1 = 0