Answer:
(a) 8x -8y = 32
Step-by-step explanation:
The x- and y-intercepts can be found easily from a standard-form equation for a line:
ax +by = c
When x=0, the y-intercept is
0 +by = c
y = c/b
When y=0, the x-intercept is
ax +0 = c
x = c/a
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The graph shows the y-intercept is -4, and the x-intercept is 4. This tells you a couple of things:
- 'a' and 'b' will have opposite signs
- 'a' and 'b' will have the same magnitude
Only choice A has these characteristics:
8x -8y = 32 . . . . . . . . y-intercept = 32/-8 = -4; x-intercept = 32/8 = 4
