b One of the points is on two whole numbers. What about the other point?
A
ay-intercept: Negative Explanation: See solution.
B
bEstimation: (4,1.8) and (8,4) Explanation: See solution.
Practice makes perfect
a When we draw an imaginary line through these points it will cut the x-axis between 0 and 2 and again cut the y-axis at a point below the x-axis. Therefore, it appears to have a negative y-intercept.
b The first point is at x=4 and its vertical distance from x-axis is quite close to 2. We can approximate it to be 1.8, giving us the coordinates (4,1.8). Following a similar reasoning, the second point is on (8,4). Let's find the slope of the line that passes through them.
A slope of 1120 means if we take 20 steps to the right, the graph increases by 11 steps. Conversely, if we take 20 steps to the left, we would have to go down by 11 steps to get to another point.
