Suppose y varies directly with x, and y = 8 when x = –6. What direct variation equation relates x and y? What is the value of y
when x = –2?
2 answers:
Y = kx
(i) 8 = k(-6)
k = -4/3
=> equation ： y=(-4/3)x
(ii) y = (-4/3)(-2)
y= 8/3
Y=12 given -6+4=-2 just add 4 to x
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She should have added 3 instead of subtracting because u need to do inverse operation when solving equations.
The answer is d. the y intercept is 3 and the slope is 4
