What does the square of the correlation measure? The slope of the least squares regression line.
The y-intercept of the least squares regression line
The percentage of variation in yvalues that can be explained by variation in x-values,
The extent to which cause and effect is present in the data.

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1

step-by-step explanation:

compare