4 °C
i just googled it XD. source: https://www.google.com/search?q=the+density+of+water+is+maximum+at+which+temperature&oq=the+density+of+water+is+maximum+at+which+temperature&aqs=chrome..69i57.699j0j4&client=ms-android-samsung&sourceid=chrome-mobile&ie=UTF-8
We can use the points (-2, -5) and (18, -5) to solve.
Slope formula: y2-y1/x2-x1
= -5-(-5)/18-(-2)
= 0/20
= 0
Best of Luck!
question 3: -2
question 4: 0
Ordered pairs in a graph go in the sequence of (x, y)
