Ερωτήσεις Σωστό - Λάθος
1. The graph of any equation in two variables is a straight line.
True 
False
True 
False 2. The graph of any linear equation in two variables is a straight line.
True False
True False 3. Every line has a slope.
True False
True False 4. Every non vertical line has a slope.
True False
True False 5. Every line is the graph of a linear equation in two unknowns.
True False
True False 6. To find the equation of a line, all you need is a point and the slope.
True False
True False 7. You need to know the y-intercept to write the equation of a line.
True False
True False 8. The graph of a quadratic function f(x) = ax2+bx+c (a 
0) is always a parabola.
True False
0) is always a parabola. True False 9. The vertex is the lowest point on a parabola.
True False
True False 10. Every parabola crosses both axes.
True False 12. If displacement is a linear function of time, then the slope of the graph represents the velocity.
True False
True False 13. If the weekly sales q of an item priced at $p are given by q = 
3p + 40, then the weekly sales decrease by 3 items for every $1 increase in price.
True False
3p + 40, then the weekly sales decrease by 3 items for every $1 increase in price. True False 14. If the total weekly revenue for items priced at $p is given by the function R(p) = p2 + 100p, then the total weekly revenue will be $100 if we give the items away.
True False
p2 + 100p, then the total weekly revenue will be $100 if we give the items away. True False 15. A real-valued function of a real variable is a rule that assigns exactly one number to each specified input number in a specified domain.
True False
True False 16. Some functions assign two or more numbers to each specified input number.
True False
True False 17. If f(x) = x3 + 3x, then f(x+h) = x3 + 3x + h.
True False
True False 18. If f(x) = 1 / (2x), then f(x+h) = 1 / (2x) + h.
True False
True False 19. If f(x) = x / (x 1), then the largest possible domain of f consists of all real numbers except 0.
True False
1), then the largest possible domain of f consists of all real numbers except 0. True False 20. Every equation in x has at least one solution that can be found with a graphing calculator.
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