Question 929343
the standard slope-intercept form for an equation of a line is 
{{{y = highlight_green(m)x + highlight(b)}}}  where m is the slope and b the y-intercept.  
......
 y = 3.5x
Per standard form...this gives...
{{{y = highlight_green(3.5)x + highlight(0)}}}
.....
slope = 3.5 
y-intercept is 0
......
re TY
putting  y = 3.5x into the standard form, it shows m = 3.5
and as there is no constant attached to y = 3.5x ..it is therefore ZERO
y = 3.5x + 0  is the same as y = 2.5x and therefore the y-intercept = 0