let's convert the mixed fraction to improper fraction, and then check.

Answer:
-7x+14y-35
Step-by-step explanation:
Answer:
x^2+4x-4
Step-by-step explanation:
4x+1+x^2-5
x^2+4x-4
Answer:
True
Step-by-step explanation:
x=5+7=12
The only solution is x=12.
Answer:
(a) The amount of ice cream increase as temperature increases
(b)
--- equation
--- y intercept
--- slope
Step-by-step explanation:
Given
See attachment for graph
Solving (a): The relationship between the variables
From the attached graph, the dots on the graph increases towards up-right direction. This implies that there is a positive correlation between the variables.
In other words;
The amount of ice cream increase as temperature increases
Solving (b): The line of best fit
First, we draw a line through the points (the line should have almost equal points on both sides; see attachment 2).
From (2), we select any 2 points on the line:


The slope (m) is:




So, the line of best fit is:

Substitute known values:



The y-intercept is when 
So, we have:


