From -c< -7 we have c> 7. Since that has just a single variable, we graph it on a number line. Locate the point "7" on your number line and indicate the numbers larger than that. How you do that really depends upon what your teacher wants. One common way would be the draw a small "open" circle at 7 (not shaded) to indicate that 7 is not included and an arrow on the interval above 7 pointing upward to indicate "larger than 7". Another way is to draw a "parenthesis" at 7, "opening" to the right. Similarly indicate "c< -5" mark the numbers on the number line below -5.
Notice that those intervals do not overlap. There are NO numbers that satisfy both "9- c< 2" and "-3c< 15". The two intervals show those numbers that satisfy "9- c< 2" or "-3c< 15".