## Detailed description

a. y = x squared + x + 1, turning point at (−1 over 2, 3 over 4), one positive y-intercept.

b. y = −x squared + x + 1, turning point at (−3,−4), one negative y-intercept.

a. y = x squared + x + 1, turning point at (−1 over 2, 3 over 4), one positive y-intercept.

b. y = −x squared + x + 1, turning point at (−3,−4), one negative y-intercept.