##### Across

**1.**When one function is substituted into another function .**5.**From the top of the triangle, cut the corresponding opposite side in half.**7.**26:12=13:6 is the product of the second and third.**9.**The unknown is equality .**10.**Straight path that goes on forewer .**12.**How many types of ratios are written ?**14.**1:3=2:6 is the product of the first and fourth.**16.**30 percent of 80.**17.**An angle less than ninety .**18.**f(x)=xn is a writton function .

##### Down

**2.**What is b called in the function y=kx+b?**3.**The result of adding two or more numbers .**4.**A fiqure creted by two rays .**6.**All sides of the triangle are equal .**8.**A straight line with the endpoint .**11.**A number equal to LCM(121;144):GCM(121;144).**13.**A fiqure with three sides .**15.**What is k called in the function y=kx+b?**19.**Go on forewer in one direction .