No, it is not a true proportion.
Slope intercept form is y=mx+b
m(slope)=1/2
(x,y)—->(-8,-4) so x=-8 and y=-4 substitute and solve for b
-4=1/2(-8)+b
-4=-4+b
+4=+4
0=b
Answer is C.
Since each side is 68/4 = 17 cm ( the hypotenuse of each right triangle), and half of the shorter diag is 8, then 17^2-8^2 = a^2
225=a^2
15 = a, which is half of the larger dish, so the larger diag is 30cm.
Combine like terms such as 3x and 5x and combine 4 and 3
the answer would be 8x+7
mark me brainliest if the answer is correct, thank you in advance :)