Answer:
The number is 5
Step-by-step explanation:
A number is multiplied by 8 = 8x
8x + 2
8x + 2 = 42 Subtract 2 from both sides
<u> - 2 -2</u>
8x = 40 Divide by 8
x = 40/8
x = 5
From either side of <em>x</em> = -2, <em>f(x)</em> approaches -5. The plot also shows it's continuous there, so each of these have a value of -5.