Ryan stepped into an escalator moving at a constant rate. The table below shows his distance from the first floor after different amounts of time. What was Ryan’s distance from the first floor when he stepped onto the escalator?_ centimeters

step 1
Find the slope or unit rate of the linear equation
take the points
(6,1070) and (9,980)
m=(980-1070)/(9-6)
m=-90/3
m=-3 cm/sec
step 2
Find the equation in pont slope form
y-y1=m(x-x1)
we have
m=-3
(x1,y1)=(6,1070)
substitute
y-1070=-3(x-6)
Convert to slope intercept form
isolate the variable y
y-1070=-3x+18
y=-3x+1088
therefore
the y-intercept or initial value is 1088 cm
the answer is
1088 cm