Write the equation of the line passing through points (0,0) and (-7, 4/5)

Working on the question

First find the slope, to find the slope use this formula (y2 - y1) / (x2 - x1). 
(4/5-0) / (-7-0)
4/5 / -7 
4/-35 that's the slope 
Now, use the point-slope formula with one of our points, (0,0)
y-y1=m(x-x1)
y-0=4/-35(x-0) multiply by -35 to candle the fraction 
-35y=4(x-0) distribute
-35y=4x divide -35 0n both sides 
y= -4/35 x

Hope it helped!

The answer of this question is 672 .