NC Math 1 EOC Review Non-Calculator

A scatterplot was constructed on the graph below and a line of best fit was drawn. What is the equation of this line of best fit?

• y = x + 5

• y = x + 25

• y = 5x + 5

• y = 5x + 25

A librarian recorded the number of books that 10 students checked out during lunch on Monday. The table below shows the number of books checked out by each student. Carlos checks out 8 books on Tuesday. Which is true if Carlos' number is included in the data set?

• The median increases.

• The standard deviation decreases.

• The mean increases.

• The interquartile range increases.

A student graphed the parabola shown below. Which quadratic equation corresponds to this graph? Note: a is a constant; a does not equal 0.

• y = a(x - 2)(x + 3)

• y = a(x + 2)(x + 3)

• y = a(x - 2)(x - 3)

• y = a(x + 2)(x - 3)

Which graph represents the solution of 3y - 9 <= 6x?

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Jackson and Maeva work at a concession stand. They each earn $8 per hour. Jackson worked three hours more than Mae. If Jackson and Maeva earned a total of $120 how many hours did Jackson work?

Which of the systems of equations below represent the situation above?

• J = M + 3

  8J + 8M = 120

• J - M = 3

  8J = 120 - 8M -3

• M = J + 3

  8M + 8J = 40

• 8J = 8M = 3

  J + M = 120

Simplify. Choose the answer that is written as a fraction in lowest terms.

• -24

• 1/18

• 1/9

• 1/3

Six organisms are present in a sample now. If these organisms double every thirty minutes, how many will be present after 90 minutes (assuming none of them die)?

• 7.43 x 10 ^ 27

• 3027

• 216

• 48

A line segment has endpoints A(4, -3) and B(-6, 2). What is the equation of the line that connects AB in slope intercept form?

• y = (-1/2)x - 6

• y = (1/2)x - 6

• y = (-1/2)x + 6

• y = (1/2)x + 6

The sum of three consectuive odd integers is 18 less than five times the middle number. What is the sum of the first two numbers?

• 20

• 16

• 9

• 7