When one quantity increases and the other quantity increases as well, then that is a direct proportional relationship.
So the graph of this relationship is a direct proportional relationship.
Hope this helps.
The x is (3,0) and the y is (0,-10)
When the graph reaches his point
5x+2(-2x+3)=5
5x-4x+6=5
x=-1
Then plug back into either to solve for y.
y=-2(-1)+3
y=2+3
y=5
Substitution means you just replace one variable with the other equation so only one variable is showing. That’s how you solve for the first variable.
