Question

Identify the value of a if
y= ax+ 7x + 2
and the point (2, 12) is on the graph.

Answer 1

a=-2

So yep. ;)

Explanation:

Alright, so, (2,12), 2 is the x and 12 is the y.

Stick them into the equation:
`12=a*2+(7*2)+2`

Then, solve:

`12=a*2+14+2`

a = -2

So yes, they're on the graph.

Hope this helped! :)