Pls solve i will give brainliest ifcorrect

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!

  21.3

step-by-step explanation:

multiplying the given equation by c/sin(25°), we get

  c = 9/sin(25°) ≈ 21.2958 ≈ 21.3

we assume "c" is the length of ab, the side opposite angle c in triangle abc.