All graphs are straight lines.
QUESTION 7
y = 2x - 1 is a straight line intercepts with x-axis at 0.5 and intercepts with y-axis at - 1
QUESTION 8
y = - 6x + 2 is a straight line intercepts with x-axis at 0.33 and intercepts with y-axis at 2
QUESTION 10
y = 7 is a straight line parallel with x-axis and intercepts with y-axis at 7
QUESTION 11
y = 3x - 9 is a straight line intercepts with x-axis at 3 and intercepts with y-axis at - 9
Hope that helps you and good luck.