To determine whether y varies directly with x, we need to check if the ratio of y to x is constant.
Given that y = 2.52 when x = 8.4, we can find the constant of variation, k.
k = y/x = 2.52/8.4 = 0.3
Now, to find y when x = 2.7, we can use the equation y = kx.
y = 0.3 * 2.7 = 0.81
Therefore, the answer is C. 0.81.
Determine whether y varies directly with x. If so, find the constant of variation k and write the equation.
If y = 2.52 when x = 8.4, what is y when x = 2.7
A. 9
B. -9
C. 0.81
D. -0.81
1 answer