Question

Y is directly proportional to x.y is 30 and x is 6 work out the equation linking x and y

Answer 1

Answer:

y = 5x

Step-by-step explanation:

Given that y is directly proportional to x then the equation relating them is

y = kx ← k is the constant of proportionality

To find k use the condition that y = 30 when x = 6

k = $\frac{y}{x}$ = $\frac{30}{6}$ = 5

y = 5x ← equation of proportion