Plug in 300 for C(x), to get:
300=
Then subtract to get: 0=
Then use the quadratic formula and plug everything in. Use a calculator to simplify.
You'll get two answers: 29.486 and -0.513.
Since you can't sell <em>"negative" </em>tacos, use the positive solution
Around 29-30 tacos.
Answer:
C. The slope is 3 and the y-intercept is -3