Question 1187091
Using scale of 2cm toi represnt 1unit of the ×-axis and 2cm toi represnt 5unit onthe y-axis,draw thé graph of y=ײ+3×-1 for values of ×in thé range -4≤×≤3 
a) from your graph détermine thé value of× for which y=2.5
=============================
Why don't you do that?