I just need to solve problems C and E. Please explain the question.

C)

We were given that the line of best fit is:

The equation of a straight line is given by the expression:

When we compare the equation of the line of best fit with the equation of a straight line, we have:

The slope being -0.0001 implies that as the years go by, the winning time keeps reducing at an average rate of 0.0001 seconds per year

D)

Based on the line of best fit, the value of ''r'' (regression coefficient) is close to zero.

A regression coefficient close to zero indicates a weak or no association between the variables

E)

Assuming we choose a value of interest for the years, we have:

Predicting using the line of best fit;

in the year 2010, the winning time was 5:34:05 seconds

in the year 2005, the winning time was 5:35:14 seconds

c. 65°

step-by-step explanation:

we are given a triangle with two known angles, 62° and 53°, while the third angle x is unknown and we are to find its value.

we know that the sum of angles in a triangle is equal to a total of 180 degrees. so we can write it as:

x + 62° + 53° = 180°

solving to find the value of x:

x = 180 - (62 + 53) = 65°

therefore, the value of x in this triangle is 65°.

constant of proportionality = 3 and the equation is c = 3p.

step-by-step explanation:

c = kp   where c = amount of caffeine in mg., p = oz of pepsi and k is the constant of proportionality.

substituting the values given:

24 = 8k

k = 3.

the same value of k will be obtained if we substitute the other given values.