Answer: Line 1 is difficult to determine exactly. The graphed lines are thick compared to the grid lines, so it is impossible to see the intersections clearly.
1.) k = -2/5 y = -2/5 x OR k= - 3/7
2.) k = -4/5 y = -4/3 x
3.) k= 2 y = 2x
4.) k = 1 y = x
Step-by-step explanation:
All of the lines intersect the origin, so the y-intercept is 0 that is the b in slope intercept form.
k, the constant in direct variation equations is the coefficient of x That is m, or slope in slope intercept form.
You should be able to pick a y-value from any coordinate where the graphed line intersects the grid and divide it by the x value of that coordinate. For example, in line 1, the line crosses the grid at (-5, 2) Divide 2/-5 BUT the line should intersect (5,-2) but that is not the case. Also Line 1 does intersect (7, -3) so that is a possible point to calculate k. -3/7 But line 1 does not intersect (-7,3) exactly. Going through this made the issue evident.
The procedure does work well for the other lines.
Sorry this can't be more definite. Contact the instructor to make the issue known!
