List all integers between −100 and 100 that are congruent to −1 modulo 25.

"-1 modulo 25" is "1 less than a precise multiple of 25". 
So what are the exact or precise multiples of 25 in the appropriate interval? 
It is -75, -50, -25, 0, 25, 50, 75, and 100. 
Now just subtract 1 from each of them.

So the answers are -76, -51, -26, -1, 24, 49, 74, and 99.

y = 2x + 15

Step-by-step explanation:

y = 2x + 7           (-10,-5)

find your b/ y-intercept

y = mx+b   2= slope

plug in your (x,y) points

-5 = 2(-10) + b

-5 = -20 + b

15 = b

y=2x + 15