Question 137378
MONTH 1=50 (1,50)
MONTH 3=60 (3,60)
SLOPE=(60-50)/(3-1)=10/2=5
50=5*1+b
b=50-4
b=45
THUS THE EQUATION IS:
Y=5X+45
Y=5*7+45
Y=35+45
Y=80 PROJECTED SALES IN THE 7 th. MONTH. 
OCTOBER WOULD BE MONTH 7
{{{ graph( 300, 200, -6, 10, -10, 90, 5x +45) }}} (graph 300x200 pixels, x from -6 to 10, y from -10 to 90, 5x +45).