SEM ALG 1_Mixed Review 17

What is the correlation for the following Scatter Plot.

• Weak Positive

• No Correlation

• Strong Negative

• Weak Negative

• Strong Positive

A student receives a loan of $450 and makes payments of equal amounts every week. The input-output table shows several values of an arithmetic sequence, where the input represents the number of payments made by the student, and the output represents the remaining amount of the loan, in dollars.

Which function f(n), models the situation, where n represents an integer greater than 0?

• f(n) = -90n + 360

• f(n) = -90n + 450

• f(n) = -45n + 360

• f(n) = -45n + 450

The scatter plot represents the relationship between the average number of times a person blinks, y, per x, minute staring at a computer screen.

Which statement is true?

• There appears to be a correlation between the time spent staring at a computer screen and the average number of times a person blinks. This proves there is a correlation.

• There appears to be a correlation between the time spent staring at a computer screen and the average number of times a person blinks, but that does not prove there is causation between the variables.

• There does not appear to be a correlation between the time spent staring at a computer screen and the average number of times a person blinks, and that proves there is causation between the variables.

• There does not appear to be a correlation between the time spent staring at a computer screen and the average number of times a person blinks, but that does not prove there is causation between the variables.

For which situation does one quantity change at a constant rate per unit interval relative to another quantity?

• For every day that passes, the water level of a lake rises or falls.

• For every month that passes, a stock earns 1.2% in value.

• For every week that passes, a persons reads 120 pages

• For every year that passes, a plant triples in height.

• 3x - 4

• 3x + 6

• x + 6

• x - 4