First, let's create an equation for the table: m = 2n + 40. Using this equation, we can find the values of x, y, and z.
WORK: x = 2(4) + 40 x = 8 + 40 x = 48 y = 2(5) + 40 y = 10 + 40 y = 50 z = 2(6) + 40 z = 12 + 40 z = 52
Next, using the equation, we know that the initial investment would be 40, since that is the y-intercept of the equation. To express M in terms of N, that would be our equation m = 2n + 40. To find 10 years, we'll plug in 10 for n.
WORK: m = 2(10) + 40 m = 20 + 40 m = 60 after 10 years
To figure out when his investment would double, we'll need to use 80 (double his initial investment of 40) in place of m.
WORK: 80 = 2n + 40 40 = 2n n = 20 years
Hope this helps!! :) If there's anything else that I can help you with, please let me know!
