Question

How do you find the slope and intercept for `y=-9x`?

Answer 1

slope = - 9, y-intercept = 0

Explanation:

The equation of a line in `color(blue)"slope-intercept form"` is

`color(red)(|bar(ul(color(white)(a/a)color(black)(y=mx+b)color(white)(a/a)|)))`
where m represents the slope and b, the y-intercept.

The advantage to having the equation in this form, is that m and b may be extracted 'easily'.

The equation here is in this form.

That is : `y=-9xrArry=-9x+0`

and by comparison with the standard equation.

Hence: slope = - 9 and y-intercept = 0
graph{-9x [-10, 10, -5, 5]}