Answer:
y = 122.57
Step-by-step explanation:
y = 143 when x = 49
Y varies directly with x, so the equation is --> y = kx (k would be the constant of variation).
k = y/x = 143/49
y = (143/49) x
When x = 42 --> y = (143/49) · 42 --> y = 2.92 · 42 --> y = 122.57