Answer:
a) y ∝ x
y = kx
k = y/x
b) y = 7/8
Step-by-step explanation:
Suppose that y varies directly with x and y = 2 when x =16
a)write a direct variation equation that relates x and y
y varies directly with x
Hence:
y ∝ x
y = kx
Where k is constant of proportionality
y = 2 when x =16
Hence:
2 = 16k
k = 2/16
k = 1/8
b) find y when x =7
y = kx
k = 1/8
x = 7
y = 1/8 × 7
y = 7/8
