Can someone please help me with math.

3.C

Step-by-step explanation:

the line is going down so the slope is negative and the y intercept is 4. also to find the slope fine a point for example 1,1 so either go up or down the the next point like 0,4 so it up 3 and over one which is 3/1 which is just 3.

4.c

for the slope you go up 5 over 1 for and for the y intercept will always gave 0 and something beside it but sense it us 0 then you just done have one also you can just plot the points and make a line as well.

111

step-by-step explanation:

c-   36

taxicab circle radius 9 has 4(9) = 36 points