Answer:
Irrational, because it is non-terminating and non-repeating!
Multiply the investment fraction by the corresponding return, and add the products. The given fractions add to 59%, so the remainder is 41%. (The total of the fractions is 100%—all of the portfolio.)
... 0.43*9.1% + 0.16*16.7% + 0.41*11.4%
... = 3.913% + 2.672% + 4.674% = 11.259%
<em>I</em><em> </em><em>have</em><em> </em><em>attached</em><em> </em><em>the</em><em> </em><em>graph</em><em>!</em><em> </em>

Here are some details about the equation and the graph!
Details of equation ⤵️
- <u>The</u><u> </u><u>equation</u><u> </u><u>is</u><u> </u><u>written</u><u> </u><u>in</u><u> </u><u>slope-intercept</u><u> </u><u>form</u><u>.</u>
- <u>The</u><u> </u><u>slope</u><u> </u><u>of</u><u> </u><u>the</u><u> </u><u>line</u><u> </u><u>is</u><u> </u><u>0</u><u>.</u><u>5</u><u>.</u>
- <u>The</u><u> </u><u>y-intercept</u><u> </u><u>is</u><u> </u><u>1</u><u>.</u>
Details of graph ⤵️
- <u>Root</u><u> </u><u>=</u><u> </u><u>(</u><u>2</u><u>,</u><u>0</u><u>)</u>
- <u>Domain</u><u> </u><u>=</u><u> </u><u>x</u><u>∈</u><u>R</u>
- <u>Range</u><u> </u><u>=</u><u> </u><u>y</u><u>∈</u><u>R</u>
- <u>Vertical</u><u> </u><u>intercept</u><u> </u><u>=</u><u> </u><u>(</u><u>0</u><u>,</u><u>1</u><u>)</u>
Answer:
I think it's B or C but I'm not sure cuz I'm struggling with this question also