Question

the value of y varies directly with x, and y = 77 when x = 7. what is y when x = 12? y = ? remember: y = kx

Explanation:

Step1: Find constant k

Substitute $y=77$, $x=7$ into $y=kx$:
$$77 = k \times 7$$
Solve for $k$: $k = \frac{77}{7} = 11$

Step2: Calculate y when x=12

Use $k=11$ and $x=12$ in $y=kx$:
$$y = 11 \times 12$$

Answer:

132