we have the equation
8x + 4y = 64
REmember that
The y-intercept is the value of y when the value of x is equal to zero
so
Find the y-intercept
For x=0
substitute in the equation
8(0) + 4y = 64
4y=64
Solve for y
y=64/4
y=16
therefore
The graph intersect the y-axis at point (0,16)
Part 2
8x + 4y = 64
Solve for y -----> that means, isolate the variable y
so
step 1
subtract 8x both sides
8x + 4y -8x= 64-8x
4y=64-8x
step 2
Divide by 4 both sides
4y/4=(64-8x)/4
simplify
y=16-2x
Rewrite
y=-2x+16
Part 3