The correct answer would be
A. y = 0.5x + 4.5
Answer:
Step-by-step explanation:
Given
Represent Fred with F; Norman with N and Dave with D.
Required
Determine the arithmetic mean of F and N
First, we have that:
Substitute 44 for D
Subtract 44 from both sides
Arithmetic mean of F and N is calculated as follows:
4k(3c-10)
factoring:
14ck *2 + 10ck *2 - 16ck - 40k
28ck -16ck - 40k
12ck - 40k
The easiest thing to find in a table showing a linear relationship is the slope. If the x is increasing by one each and every time (or cell because we are talking about tables), then the difference between each y value is the slope. Also, if you are lucky enough to have that sort of table, you can easily find the y-intercept by looking at the y value that is next to the x value of 0. Otherwise, work backward to find the y-intercept. For every x value you go down to try and get to 0, minus the y values also by the slope.
D & E
D) if you divide the ratios by 2 you get 1:6
E) if you multiply each ratio by 4 you get 8:48
You can’t divide or multiply any of the other numbers with 2 and 12 (together) to get you the other answers
