To solve this problem you do this:
-first you add 9 to both sides to eliminate the 9
-you then divide by 5 to both sides to get the y by itself
-and your left with y=5
A =-5
B=6
C=-12
So ab/c
= -5×(-12)/6
=60/6
=10
Any straight line on the coordinate plane can be described by the equation
y=mx+b
Where:
x,y are the coordinates of any point on the line
m is the slope of the line
b is the intercept (where the line crosses the y-axis) .
The slope m can be found beetween two points on the line:
and
In this case, the points is on the y-axis (0,300) and the x-axis (450,0), whereby the slope m is found:
We already have b, because b is the point, where the line crosses the y-axis.
b=300
So the equation is:
⇒
The graph is attached.