# Synopsis

PDX_MSGT gdx_IsCurveLinear(long option, MDA_PTR gdx_crv_ptr, double tol, PDX_BOOL *linear)

# Purpose

Routine to determine if a curve is linear

# Description

Routine calls appropriate routine to determine if curve is linear.

# Input

## option

not used

## gdx_crv_ptr

db_ptr to desired curve

## tol

tolerance to use to check linearity

# Output

## linear

### PDX_TRUE

Curve is a straight line

### PDX_FALSE

Curve is not a straight line

# Tolerances

          .fi

# Return

          GDX_NOERR
          Low level error return
          .fi