JSON.parse(httpRequest.responseText).rates.ILS;

httpRequest.open('GET', 'https://api.exchangeratesapi.io/latest?base=USD');

{
"rates": {
    "BGN": 1.7225647349,
    "HRK": 6.5332041571,
    "ILS": 3.6087722389,
    "CHF": 0.998590805,
    "PHP": 52.8818037696,
},
"date": "2019-03-20",
"base": "USD"
}

.date           will return     2019-03-20
.base           will return     USD
.rates.ILS      will return     3.6087722389
.rates.CHF      will return     0.998590805

//this sample code needs to be completed to work with all types of pets
//currently working only with Dogs 
var webAddr = 'https://dog.ceo/api/breeds/image/random';
function changePet(){
    var selectedPet = document.querySelector('#pets').value;        //select the pet
    switch(selectedPet) {
        case 'Dogs':
            webAddr = 'https://dog.ceo/api/breeds/image/random';    //set the url of the 'open' action
        case 'Cats':
            webAddr = 'https://aws.random.cat/meow';
        case 'Foxes':
        webAddr = 'http://randomfox.ca/floof';
    }
}
function makeRequest() {
    var httpRequest = new XMLHttpRequest();
    httpRequest.responseType = 'json';
        httpRequest.onload = function() {                       //using the onLoad event
        if (httpRequest.status === 200){
            console.log(httpRequest.response);
            var json = httpRequest.response;
            document.querySelector('.image').src = httpRequest.response.message;        //message is for 'dogs'
        } else {
            alert('There was a problem with the request. \r\n The Page has returned error number: ' + httpRequest.status)
        }
    };
    httpRequest.open('GET', webAddr);
    httpRequest.send();
}
//this sample code needs to be completed to work with all types of pets