9514 1404 393
Answer:
a: y = x
b: y = 2/3x
Step-by-step explanation:
A proportional relationship is described by the equation ...
y = kx
The value of the constant k can be found from any (x, y) pair:
k = y/x . . . . . divide both sides of the above equation by x
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Line 'a' goes through the point (1, 1), so we have ...
k = 1/1 = 1
y = x . . . . . . . the coefficient 1 is not shown. Equation for line a.
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Line 'b' goes through the point (3, 2), so we have ...
k = 2/3
y = 2/3x . . . . . . Equation for line b.
