The value of a should be 2000. Hope this helps.
You need to find the slope
251-248. 3
------------- = --------
2005-1965. 40
Well, your ratio given is 18 to 4. so multiply both numbers (18 and 4) by some number and you will have an equivalent ratio.
example: if you had 2 times as many people, then an equivalent ratio would be 18*2 to 4*2 = 36 to 8
Any portion of the circumference of a circle is called a radius
