A scale factor<span> is a number which </span>scales<span>, or multiplies, some quantity. In the equation y = Cx, C is the </span>scale factor<span> for x. C is also the coefficient of x, and may be called the constant of proportionality of y to x.</span>
first of all make a diagram write 20 and circle that and make a line write their 2× 10 and circle 2 and again make a line and write 2× 5 and make a circle and write 20= 2,2,5
The pattern
5 10 3 15 20 13 25 30....
the next number is
23 because after each 2 numbers its +10
Hope this helps,
xXharleyquinn04Xx
The answer is B! Hopefully this helps a lot ......GOOD LUCK
