Final answer:
The line y - x = 7 intersects the y-axis at the point (0, 7), which represents the y-intercept of the line.
Step-by-step explanation:
To determine the point at which the line y - x = 7 intersects the y-axis, we need to find the y-coordinate when the x-coordinate is 0. At the y-intercept, the general form y = mx + b reflects that x equals zero.
To find this, we plug in x = 0 into the equation to get:
y - 0 = 7
y = 7
So, the line y - x = 7 intersects the y-axis at the point (0, 7). This point is referred to as the y-intercept. The line graph about slope and algebra of straight lines in figure A1 states that the y-intercept is the point where the line intersects the y-axis. In this case, that point is (0,7).