X²+y² =(Radius)²
x²+y² =10². So the radius is 10
you need to find how much the output changes for each unit change in the input. (ie from an input change from 5 to 6 the output changes by three units and an input change of 3 (2 - 5 ) units the output changes by 9 units). This will give you the gradient of the equation. then you have to find out the y intercept by finding what the output is when the input is 0. Do this by multiplying the input by the gradient and then subtracting it from that inputs output. This will give you the answer A) 3x
(Sorry, its a bit wordy :) )
1/27 = 3^(-3)
3^(3x+6) = 3^(-3)
When bases are the same, all you need to do is set the exponents equal to each other:
3x+6 = -3
3x = -9
x = -3
1- slope is 4 y intercept 0,2
2- slope is 6 y intercept 0,5
3- slope is 2 y intercept is 0,5
4 -slope is 1 y intercept is 0, 3/4
5- slope is 10 y intercept is 0,3
6- slope is 4 y intercept is 0,1/2
7- slope is 4 y intercept is 0, 3/2
8- slope is 1 y intercept is 0,2
D is the correct answer because it can be simplified
