Question

Points a and b both on line y=3x+7 work out the missing y coordinate for a and the missing x coordinate for b

Answer 1

Missing
`y` coordinate for
`a` is
`3x+7`

Missing
`x` coordinate for
`b` is
`(b-7)/(3)`

Explanation:

Given: Equation of a line is
`y=3x+7`

To find: missing
`y` coordinate for
`a` and the missing
`x` coordinate for
`b`

Solution:

First find missing
`y` coordinate for
`a`

Put
`x=a` in
`y=3x+7`

`y=3(a)+7=3a+7`

Now find the missing
`x` coordinate for
`b`

Put
`y=b` in
`y=3x+7`

`b=3x+7\\3x=b-7\\\\x=(b-7)/(3)`