Question

How do you find the x and y intercept of `3x - y = - 30`?

Answer 1

`x`-intercept: `color(red)(-10)`
`y`-intercept: `color(blue)(30)`

Explanation:

The `x`-intercept is the value of `x` when `y=0` (i.e. a point on the X-axis)

`3x-y=-30`
with `y=0`
`rarr 3x=-30`
`rarr x=-10`

Similarly the `y`-intercept is the value of `y` when `x=0`

`3x-y=-30`
with `x=0`
`rarr -y=-30`
`rarr y=30`