Question

Question is compulsory for all the students.
Section - A Very short answer type questions)
1. Write the coordinates of a point lies in III quadrant ?
2. What is abscissa?
3. What is the equation of straight line?
4. Write the equation of a line parallel to x-axis ?
5. Why types of graph is there for a linear equation ?
6. Find the coordinates of a point whose abscissa is -3 and lies on y-axis.
7. Write an equation of a line passes through origin?
8. What is the probability of a sure event ?
9. Write all the possible outcomes when we toss two coins together?
10. Write an algebraic eqn, in two variables for the condition that Age of x' exceeds age of 'y' by 7
years.



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Answer 1

1.-,-
2.Abscissa is the value of the X-coordinate on a coordinate plane.
3.Equation of a Straight Line. Equations of straight lines are in the form y = mx + c (m and c are numbers). m is the gradient of the line and c is the y-intercept (where the graph crosses the y-axis).
4.The point the line crosses the y axis is equal to the content value above. This says that when the above constant is 0, the line represents the x axis. It should be clear that the same applies to the lines parallel to y axis as well where the equations are of the form x= constant. Y=mx+c is standeredequation of line.
5.The graph of a linear equation in two variables is a line (that's why they call itlinear ).

If you know an equation is linear, you can graph it by finding any two solutions

(x1,y1) and (x2,y2) ,

plotting these two points, and drawing the line connecting them.

6.0,-3
7.If the line passes through the origin, then you know that (0,0) is on the line. If the line is perpendicular to y=2x+3 then we know the line has slope m=−0.5.
8. 1
9.HH,HT,TH,TT
10.in fig. 2