(Q2) Does y = x+7 represent a straight line ? Draw the line on the coordinate plane.At which point does this line intersect Y- axis? How much angle does it make with X axis? Discuss with your friends.
Yes. y=x+7 represents a straight line.
y = x+7
x
-
y
(x,y)
(,)
(-,)
(,)
Angle made by y = x+7 with X-axis is 45° ((0,7) and (-7,0) are equidistant from the origin and hence the triangle formed is right isosceles triangle).