text: function plusMinus(arr) {
    // print out ratio of positives;
    // print out ratio of negatives;
    // print out ratio of 0s;
  
    let countPositive = 0
    let countNegative = 0
    let countZero = 0
    let arrLength = arr.length
  
    // iterate through the element of the array;
    for (i = 0; i < arrLength; i++) {
      // taking the ith element, is it positive, negative, 0;
      // add the ith element to an appropriate count variable;
      if (arr[i] > 0) {
        countPositive++
      } else if (arr[i] < 0) {
        countNegative++
      } else {
        countZero++
      }
    }
    // return positive ratio
    console.log(countPositive / arrLength)
    // return negative ratio
    console.log(countNegative / arrLength)
    // return 0 ratio
    console.log(countZero / arrLength)
  }
  