Answer
a) 0.22
b) 5.50
c) Intercept: 0.12; Slope: 18.33
d) 18.46
Work Step by Step
a) Looking at the graph at y= 4.0, x is between 0.20 and 0.25, só 0.225 is a close approximation
b) Looking at the graph at x=0.3, y is approximately halfway between 5.00 and 6.00, so 5.50 is a good estimate.
c) At x= 0.00, y is approximately 1/8 of the way between 0.00 and 1.00, so the intercept is approximately 0.125.
Looking at the point y= 7.00, x is approximately 0.375; using this point and the intercept:
$slope= \frac{\Delta y}{\Delta x}= \frac{7.00-0.125}{0.375-0.00}=18.33$
d) From the previous item, the line's equation is $y=18.33x+0.12$, so at $x=1,00$, $y=18.46$
