PART 1:If you want to slove the graph is in which part of, you can use the test point
Is (-3, 4) can be in this part?
From there we can see this point can be the formula used
so if this point is outside, so you can draw the part inside(can be use), so if this point is inside, you can draw outside(can be use).
WARN:And don’t forgot if the formula have (=) the line should be the soild line, if there is no (
=),so the line should be the broken line!
PART 2:SOLVING SYSTEMS OF EQUATIONS GRAPHICALLY
we learn from grade 10
How much solution can linear system have?
There possible:1 , countless ,no
And we leaned the possible of two quadratic functions
one, two and none
two solution is the max
same with the linear function with the quadratic function
(use the desmos if you can’t see the solutions(the point or points that they meet)